Question about Texas Instruments TI-36X Pro Scientific Calculat

I would like to know how to calculate the square root of a complex number and would also want to know how to insert a number in between an equation coz whenever I try doing it I end up deleting the ones that follow. And the usage of insert function is not such a good idea coz I gotta press shift and then insert for the damn thing

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Posted on Jan 02, 2017

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To calculate a square root you press the square root key. A radical will be displayed. You type in the positive number whose root you want. Press the EXE key.

Sep 07, 2011 | Casio fx-300ES Calculator

To calculate the square root of 9, press

2nd [square-root] 9 ) =

The square-root is the shifted function of the x-squared key, just to the left of the 7 key. The close-parenthesis is needed to balance the open-parenthesis automatically inserted by the square-root function.

2nd [square-root] 9 ) =

The square-root is the shifted function of the x-squared key, just to the left of the 7 key. The close-parenthesis is needed to balance the open-parenthesis automatically inserted by the square-root function.

Feb 16, 2011 | Texas Instruments TI-30 XIIS Calculator

Yes, your Ti 86 should solve square root problems. At the HOME screen press [CLEAR] [2nd] [x^2] which gives the (Square Root Symbol) to display at the Home screen. Then enter the number you want the square root of and close the bracket [ ) ] and, press the [ENTER] key.

You can even get the square root of complex numbers too. Select the correct complex format in the mode settings. For example: I'll do one in the rectangular form by enter a number as (a, b). I then will go to [2nd] [MODE] then [Arrow down] 3 times and make sure the RectC is highlighted and selected. Then quit out of the mode settings screen and enter [CLEAR] [2nd] [x^2] [ ( ] [9] [ , ] [ - ] [4] [ ) ] [ ) ] [ENTER], this displays the SQRT((9,-4)) equals (3, 2); The real part is 3 and the imaginary part 2.

You can even get the square root of complex numbers too. Select the correct complex format in the mode settings. For example: I'll do one in the rectangular form by enter a number as (a, b). I then will go to [2nd] [MODE] then [Arrow down] 3 times and make sure the RectC is highlighted and selected. Then quit out of the mode settings screen and enter [CLEAR] [2nd] [x^2] [ ( ] [9] [ , ] [ - ] [4] [ ) ] [ ) ] [ENTER], this displays the SQRT((9,-4)) equals (3, 2); The real part is 3 and the imaginary part 2.

Jan 09, 2011 | Texas Instruments TI-86 Calculator

The square root of a negative number does not exist in lR, the set of real numbers.

In the set of Complex numbers the square root of -49/64 is (7/8)i, where i is the imaginary unit defined by i^2=-1.

In the set of Complex numbers the square root of -49/64 is (7/8)i, where i is the imaginary unit defined by i^2=-1.

Nov 23, 2010 | Texas Instruments TI-83 Plus Calculator

If you're dealing with complex numbers, simply switch the view to polar coordinates. The length of the vector is the magnitude of the number. SHIFT MODE down-arrow 3 allows you to select between polar and rectangular coordinates.

Oct 07, 2010 | Casio FX-115ES Scientific Calculator

Turn calculator ON

If you see no icons, Press [MENU]

Use the arrow keys to move highlighting over RUN/MAT

Press EXE button.

In Run/MAT screen press [SHIFT][MENU] to access the (SETUP)

By default the mode is et to real as you see on screen capture below

In this mode if you press [SHIFT][X^2] to access the square root, then type in a negative number) you get the following message

To be able to operate on complex number you must set the calculator Compl mode to a+ib. You have to press F2(a+ib)

Press the F2 key corresponding to tab a+ib (complex)

Now if you enter what is on the next screen capture you get the correct result.

There is another way to enter complex numbers: the polar form. It corresponds to the F3 tab r<Theta

With angle set to degrees, you can enter complex numbers in r(r,theta) form (use [SHIFT][X,Theta,T] sequence to enter the wedge). Heis a sample.

I magnified the screen capture before pressing the Post it button, but I dot vouch that the system will respect my wishes. Sorry if pictures are too small for your confort.

If you see no icons, Press [MENU]

Use the arrow keys to move highlighting over RUN/MAT

Press EXE button.

In Run/MAT screen press [SHIFT][MENU] to access the (SETUP)

By default the mode is et to real as you see on screen capture below

In this mode if you press [SHIFT][X^2] to access the square root, then type in a negative number) you get the following message

To be able to operate on complex number you must set the calculator Compl mode to a+ib. You have to press F2(a+ib)

Press the F2 key corresponding to tab a+ib (complex)

Now if you enter what is on the next screen capture you get the correct result.

There is another way to enter complex numbers: the polar form. It corresponds to the F3 tab r<Theta

With angle set to degrees, you can enter complex numbers in r(r,theta) form (use [SHIFT][X,Theta,T] sequence to enter the wedge). Heis a sample.

I magnified the screen capture before pressing the Post it button, but I dot vouch that the system will respect my wishes. Sorry if pictures are too small for your confort.

May 24, 2010 | Casio FX-9860G Graphic Calculator

"Is there anything that I can do about this to stop my answers being complex numbers when solving cubic equations?"

You are making an assumption that is unwarranted.Namely that a cubic equation must necessarily have 3 real roots. This is not the case.

Let your equation be

If coefficients are complex you should expect some complex roots. Right?

If the coefficients are REAL then depending on the discriminant

you can have three cases

DELTA positive : three distinct real roots

DELTA=0 , the equation has a multiple root and all roots are REAL

DELTA negative: the equation has ONE real root and 2 complex roots that are complex conjugate of each other.

It suffices to look at the Tartaglia/Cardano expressions of the roots to know that more often than not there is going to be complex roots.

You are making an assumption that is unwarranted.Namely that a cubic equation must necessarily have 3 real roots. This is not the case.

Let your equation be

If coefficients are complex you should expect some complex roots. Right?

If the coefficients are REAL then depending on the discriminant

you can have three cases

DELTA positive : three distinct real roots

DELTA=0 , the equation has a multiple root and all roots are REAL

DELTA negative: the equation has ONE real root and 2 complex roots that are complex conjugate of each other.

It suffices to look at the Tartaglia/Cardano expressions of the roots to know that more often than not there is going to be complex roots.

May 05, 2010 | Casio CFX-9850G Plus Calculator

(5) yx (1/32)

Oct 05, 2009 | Texas Instruments BA-II Plus Calculator

type 2nd then the square root sign and type in the number u need. the close off the parenthesis and hit enter

Sep 25, 2009 | Casio FX-300MS Calculator

If you want to enter a complex number, simply put in as (a,b). For example, to enter the complex number 1+2i, enter

( 1 , 2 )

( 1 , 2 )

Feb 25, 2009 | Texas Instruments TI-85 Calculator

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