Question about Texas Instruments TI-36X Pro Scientific Calculat

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How to calculate the square root of a complex number?

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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How to calculate the square root of a complex numb - 00a6ca8c-911c-4a34-a28d-c903414031b6.jpg



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Posted on Jul 09, 2013

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I dont know how to find the square root on my casio fx-300ES scientific calculator problem it wont let me square root 42 , when i square root 42 , 42 keeps coming and not the answer


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

1 Answer

Have TI30xIIS calculator. How do I find square root of a number. For example, the square root of 9. Where is the square root? I know 3 is the square root of 9, but how do I do this on 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.

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

1 Answer

Does my ti-86 solve sq. root problems


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.

Jan 09, 2011 | Texas Instruments TI-86 Calculator

1 Answer

The square root of -(49/64)


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.

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

1 Answer

Is there an easy way to use vector mode to find the magnitude of a vector? I know you can just take the square root of the sum of the component squares, but it would be nice to have a shortcut.


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

1 Answer

How would u get the caculater to do a square root problem like give i the real anwser


Turn calculator ON
If you see no icons, Press [MENU]
Use the arrow keys to move highlighting over RUN/MAT

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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

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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
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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)

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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.
42dfec2.jpg

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


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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.

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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

1 Answer

In complex number mode, how to get out?


"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
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If coefficients are complex you should expect some complex roots. Right?
If the coefficients are REAL then depending on the discriminant
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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.

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

2 Answers

Need to know how to do squre roots step-by-step


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

1 Answer

How to factor?foil imaginary numberz


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 )

Feb 25, 2009 | Texas Instruments TI-85 Calculator

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