Question about Office Equipment & Supplies

# How to multiply a 2x2 matrices on a 9750ii calculator

Posted by on

Hi,
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
Good luck!

Posted on Jan 02, 2017

Hello,
The so-called (2x1) matrix is not a matrix. It is a vector.
Hope it helps.

Posted on Sep 05, 2009

Calculator should be in [MATRIX] MODE
Try the matrices 2X2 matrices matA [1,2,3,4] matB [5,6,7,8], Add them, subtract them, multiply them, take the square of each. If that works for these matrices, then it must be your data. Be careful with negative numbers. To enter those, you must use the change sign (-).

There is also the possibility that the instructions were misread.

Posted on Dec 15, 2009

This is not an "Operating Systems" question!

(-5 7) (x y) = (9)
(1 10) (x y) = (21)

(-5 7) (x y) = (9)
(5 50) (x y) = (105)

(0 57) (x y) = (114)

(1) (y) = (2)

(1) (x) = (1)

QED

Posted on Mar 02, 2010

Dimensions of matrices involved in operations must match.

Here is a short summary

You can only add and subtract matrices that have the same dimensions: the numbers of rows must be equal, and the number of columns must be equal.

The multiplication of structured mathematical entities (vectors, complex numbers, matrices, etc.) is different from the multiplication of unstructured (scalar) mathematical entities (regular umbers). As you well know matrix multiplication is not commutative> This has to do with the dimensions.

An mXn matrix has m rows and n columns. To perform multiplication of an kXl matrix by an mXn matrix you multiply each element in one row of the first matrix by a specific element in a column of the second matrix. This imposes a condition, namely that the number of columns of the first matrix be equal to the number of rows of the second.
Thus, to be able to multiply a kXl matrix by am mXn matrix, the number of columns of the first (l) must be equal to the number of rows of the second (m).
Let there be two matrices MatA and MatB. The dimensions are indicated as mXn where m and n are natural numbers (1,2,3...)
The product MatA(kXl) * MatB(mXn) is possible only if l=m
MatA(kX3) * MatB(3Xn) is possible and meaningful, but
MatA(kX3) * MatB(nX3) may not be possible.

To get back to your calculation, make sure that the number of columns of the first matrix is equal to the number of rows of the second. If this condition is not satisfied, the calculator returns a dimension error. The order of the matrices in the multiplication is, shall we say, vital.

Posted on Oct 30, 2010

SOURCE: how do you add matrices

Here is enough to get you started and a little more.
Read the post ant consult your calculator manual. The screen captures below may not look exactly as your calculator but the steps are identical.

A. Define a matrix (Create it)

1. Turn calculator ON.
2. Press Menu,select the MAT icon and press [EXE]
3. You see a list of possible matrix labels (A, B, C,D,E,F)
4. All that have not been created have a "none" to their right
5. Highlight a matrix name and press the right arrow. Where there was "none" , you have a template 0x0.
6. That is where you specify the dimensions (mxn). example. 2x2
7. Enter the first dimension and press [EXE]
8. Enter the 2nd dimension and press [EXE]
9. A matrix template opens where you enter the coefficients left to right and up down.
10. After each coefficient press [EXE]. Cursor moves to the next coefficient, etc.
Press [SHIFT][QUIT] to return to the list of matrices to create new ones

B Operations on matrices
Once you have one matrix, you can do operations on it: Calculate the determinant (if matrix is square), calculate its inverse, transpose, augment it, fill it, etc..
1. These operations are accessed as follows.
2. Quit the matrix editor by pressing [Menu] and selecting the [Run] application.
3. Press [OPTN][F2:MAT]
4. You have the menus Mat,M(atrix)->L(ist), Det(erminant), Trn (transpose), Aug(ment) ->, Iden(tity),Dim(ension) Fill
Example : calculate the determinant of a matrix A (already defined).
1. You press the [OPTN][F2:MAT] key sequence (just above)
2. Press [F3:Det]; the command det is displayed on screen.
3. Press [F1:Mat] the identifier Mat is displayed.
4. Press [ALPHA] A; screen display det Mat A.
5. Press [EXE] to get the value of the determinant.
C. Square of Matrix A
[OPTN][F2:MAT] (MAT) [Alpha] A ^2 [EXE]

D. Product of two compatible matrices MatAXMatB
[OPTN][F2:MAT] (MAT) [Alpha] A [*] (MAT) [ALPHA] B [EXE]

Part E Invert a (square, non singular) matrix that was already defined.

Press [OPTN] [F2:Mat] to open a screen similar to the one in capture above
Press [F1:Mat] to have identifier Mat displayed.
Enter the name of the matrix by pressing [ALPHA] A, for example.
Press [SHIFT] [ ) ] activate the (x^-1) key.

This is what you might see (with parentheses and without).

Press [EXE] button to calculate the inverse.

Posted on Apr 07, 2011

×

my-video-file.mp4

×

## Related Questions:

### How to multiply the matrices using fx-991ms calculator

The following was written for the Casio FX-991 ES. If matrix calculations are available on your calculator you will perform them as described below. ( I have no time to verify that the FX-991ms can perform matrix calculations).

Let me explain how to create matrices. (If you know how to do it, skip to the operations on matricies, at the end.)

First you must set Matrix calculation
[MODE][6:Matrix]. Then By entering one of the numbers [1:MatA] or [2:Matb] or [3:MatC] you get to choose the dimensions of the matrix
(mxn]. Once finished entering the matrix you clear the screen.
The operations on matrices are available by pressing [Shift][Matrix]
[1:Dim] to change the dimension of a matrix (in fact redefining the matrix)
[2:Data] enter values in a matrix
[3:MatA] access Matrix A
[4:Matb] access Matrix B
[5:MatC] access matrix C
[6:MatAns] access the Answer Matrix (the last matrix calculated)
[7:det] Calculate the determinant of a matrix already defined
[8:Trn] The transpose of a matrix already defined

To subtract MatA-MatB
To multiply MatAxMatB
To raise a matrixe to a power 2 [x2], cube [x3]
To obtain inverse of MatA already defined MatA[x-1] [x-1] is the x to the power -1 key
Dimensions of matrices involved in operations must match.
Here is a short summary

The multiplication of structured mathematical entities (vectors, complex numbers, matrices, etc.) is different from the multiplication of unstructured (scalar) mathematical entities (regular umbers). As you well know matrix multiplication is not commutative> This has to do with the dimensions.

An mXn matrix has m rows and n columns. To perform multiplication of an kXl matrice by an mXn matrix you multiply each element in one row of the first matrix by a specific element in a column of the second matrix. This imposes a condition, namely that the number of columns of the first matrix be equal to the number of rows of the second.
Thus, to be able to multiply a kXl matrix by am mXn matrix, the number of columns of the first (l) must be equal to the number of rows of the second (m).

So MatA(kXl) * MatB(mXn) is possible only if l=m
MatA(kX3) * Mat(3Xn) is possible and meaningful, but
Mat(kX3) * Mat(nX3) may not be possible.

To get back to your calculation, make sure that the number of columns of the first matrix is equal to the number of rows of the second. If this condition is not satisfied, the calculator returns a dimension error. The order of the matrices in the multiplication is, shall we say, vital.

Nov 06, 2012 | Casio FX991MS Scientific Calculator

### Matrix/scalar

Sorry, but your matrices do not make sense.If you multiply a matrix by a scalar the resulting (product) matrix has exactly the same structure as the one you multiplied : (mXn) times a yields another (mXn) matrix.
Be it as it may, when you multiply a matrix by a scalar, you obtain the product by multiplying every element of the original matrix by the scalar.

Here is a screen capture showing the multiplication of a 2X2 matrix by a scalar.

Note: I have noticed that screen captures I insert in my answers are sometimes deleted (by FixYa?). So if you do not see a picture it has nothing to do with me.

Dec 11, 2011 | Office Equipment & Supplies

### Ti 89 titanium when multiply 2x2 matrix by 2x1 matrix get error diemensions

Matrix multiplication is defined only when the width of the first matrix is equal to the height of the second. You can multiply a 2x2 matrix by a 1x2 matrix or multiply a 2x1 matrix by a 2x2 matrix, but you cannot multiply a 2x2 matrix by a 2x1 matrix.

Jun 13, 2011 | Texas Instruments TI-89 Calculator

### Matrix calculations

First put the calculator into matrix mode. Do this by pressing [mode]
then [5] . Insert your matrices (you have 3 that can be saved in this calculator MatA, MatB, and MatC). Press the [ac] button, this will allow you to do calculations on the matrices. From here you use the calculation keys to do your calculations. There are many calculations that this calculator can do. A couple examples are: multiplying a matrix by a constant you would type in MatA x 4 = , or you could add two matrices of the same dimension by typing in MatA + MatB =, or you could find the determinant by typing in (det (MatA)) = .

Mar 17, 2011 | Casio FX-115ES Scientific Calculator

### How do i multiply to 4x4 matrices using fx-991 es ?

The enclosed screen capture shows all the possible dimensions for matrices on the Casio FX-991ES. As you can see the maximum dimension of any matrix is 3. You can only create matrices with dimensions less than or equal to 3.

Dec 01, 2010 | Casio FX-115ES Scientific Calculator

### Im trying to multiply matrices on my calculator and it always says "dim mismatch"

Dimensions of matrices involved in operations must match.

Here is a short summary

You can only add and subtract matrices that have the same dimensions: the numbers of rows must be equal, and the number of columns must be equal.

The multiplication of structured mathematical entities (vectors, complex numbers, matrices, etc.) is different from the multiplication of unstructured (scalar) mathematical entities (regular umbers). As you well know matrix multiplication is not commutative> This has to do with the dimensions.

An mXn matrix has m rows and n columns. To perform multiplication of an kXl matrix by an mXn matrix you multiply each element in one row of the first matrix by a specific element in a column of the second matrix. This imposes a condition, namely that the number of columns of the first matrix be equal to the number of rows of the second.
Thus, to be able to multiply a kXl matrix by am mXn matrix, the number of columns of the first (l) must be equal to the number of rows of the second (m).
Let there be two matrices MatA and MatB. The dimensions are indicated as mXn where m and n are natural numbers (1,2,3...)
The product MatA(kXl) * MatB(mXn) is possible only if l=m
MatA(kX3) * MatB(3Xn) is possible and meaningful, but
MatA(kX3) * MatB(nX3) may not be possible.

To get back to your calculation, make sure that the number of columns of the first matrix is equal to the number of rows of the second. If this condition is not satisfied, the calculator returns a dimension error. The order of the matrices in the multiplication is, shall we say, vital.

Oct 30, 2010 | Texas Instruments TI-84 Plus Calculator

### How to multiply two matricies?

Let me explain how to create matrices. (If you know how to do it, skip to the operations on matricies, at the end.)

First you must set Matrix calculation
[MODE][6:Matrix]. Then By entering one of the numbers [1:MatA] or [2:Matb] or [3:MatC] you get to choose the dimensions of the matrix
(mxn]. Once finished entering the matrix you clear the screen.
The operations on matrices are available by pressing [Shift][Matrix]
[1:Dim] to change the dimension of a matrix (in fact redefining the matrix)
[2:Data] enter values in a matrix
[3:MatA] access Matrix A
[4:Matb] access Matrix B
[5:MatC] access matrix C
[6:MatAns] access the Answer Matrix (the last matrix calculated)
[7:det] Calculate the determinant of a matrix already defined
[8:Trn] The transpose of a matrix already defined

To subtract MatA-MatB
To multiply MatAxMatB
To raise a matrixe to a power 2 [x2], cube [x3]
To obtain inverse of MatA already defined MatA[x-1] [x-1] is the x to the power -1 key
Dimensions of matrices involved in operations must match.
Here is a short summary

The multiplication of structured mathematical entities (vectors, complex numbers, matrices, etc.) is different from the multiplication of unstructured (scalar) mathematical entities (regular umbers). As you well know matrix multiplication is not commutative> This has to do with the dimensions.

An mXn matrix has m rows and n columns. To perform multiplication of an kXl matrice by an mXn matrix you multiply each element in one row of the first matrix by a specific element in a column of the second matrix. This imposes a condition, namely that the number of columns of the first matrix be equal to the number of rows of the second.
Thus, to be able to multiply a kXl matrix by am mXn matrix, the number of columns of the first (l) must be equal to the number of rows of the second (m).

So MatA(kXl) * MatB(mXn) is possible only if l=m
MatA(kX3) * Mat(3Xn) is possible and meaningful, but
Mat(kX3) * Mat(nX3) may not be possible.

To get back to your calculation, make sure that the number of columns of the first matrix is equal to the number of rows of the second. If this condition is not satisfied, the calculator returns a dimension error. The order of the matrices in the multiplication is, shall we say, vital.

Mar 06, 2010 | Casio FX-115ES Scientific Calculator

### I have a Casio fx-115ES; I have followed the manual for creating and multiplying matrices. The matrices have been simple, 2x2 for each, but it returns with "Dimension Error". Any suggestions? Thank you for...

Calculator should be in [MATRIX] MODE
Try the matrices 2X2 matrices matA [1,2,3,4] matB [5,6,7,8], Add them, subtract them, multiply them, take the square of each. If that works for these matrices, then it must be your data. Be careful with negative numbers. To enter those, you must use the change sign (-).

There is also the possibility that the instructions were misread.

Dec 14, 2009 | Casio FX-115ES Scientific Calculator

### How do i multiply a (2x2) matrix by a (2x1) in the ti 89

Hello,
The so-called (2x1) matrix is not a matrix. It is a vector.
Hope it helps.

Apr 26, 2009 | Texas Instruments TI-89 Calculator

### Matrices

Normal 0 5x2+3y2-z2 = 32
2x2-3y2+2z2 = 32
-x2+3y2-3z2 = -64

Jan 01, 2008 | Sharp EL-506WBBK Calculator

## Open Questions:

#### Related Topics:

38 people viewed this question

Level 3 Expert

Level 3 Expert