Question about Texas Instruments TI-83 Plus Calculator

# How do you use the calculator to solve functions with x cubed or x to the fourth?

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• Texas Instru... Master

Use the ^ key in the rightmost column, above the divide key.

Enter or calculate x, press ^, then press 3 or 4, then press ENTER or continue on with the calculation.

For example, to calculate 2-cubed: 2 ^ 3 ENTER will produce 8.

Posted on Sep 02, 2010

• kakima Sep 02, 2010

Sorry, I misunderstood your question on first reading. You want to know how to solve cubic or quartic polynomials, like 5x3+2x-1=0, right?

Use the Polynomial Root Finder and Simultaneous Equation Solver application preloaded into the calculator. If it's not already there, you can download it and its documentation from
http://education.ti.com/educationportal/...

For the example I presented above:

Start the app. Press any key to continue. Press 1 to select "POLY ROOT FINDER." Use the arrow keys to select 3 on the ORDER line and the other settings as desired (in most cases you'll at least want one of the complex modes since there's no guarantee that all the roots of polynomials are real). Press F5 to go to the next page. Enter the four coefficients 5, 0, 2, -1 as indicated (make sure you use the (-) key to the right of the decimal point to enter the -1). Press F5 to solve.

I get -.1858 +/ .7096i and .3717 for the three roots.

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Posted on Jan 02, 2017

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## Related Questions:

### How do I find the 4th square root of 16 on a datexx ds-700 scientific calculator??

Roots are called as follows:

square root

cube /cubic root

From 4th on, use the ordinal fifth, sixth, ... n-th

To calculate the fourth root you have two possibilities.

1. Some calculators have the x-root key marked with an x followed by the radical symbol. See the screen capture on how to find your result.

Usually the x-root is the SHIFTED function of the general power key that is marked ( [^], [X^y], or [Y^x] ). To use it, you inter the index of the root (the ordinal number). then you press the [SHIFT/2nd/ 2nd] [X^y] sequence and the number whose root you are calculating).

2. Alternatively: Use the equivalence n-th Root (x)=x^(1/n), meaning that to extract the fourth root of 16, you raise 16 to the power of (1/4)

Sep 19, 2014 | DateXX DS-700 - 2 line LCD Display 224...

### How do i use my calculator to solve this problem 40 exponent 1/3

I assume you want 40 raised to the one-third power?
Three simple ways.
Raise 40 to the one-third power: Press 4 0 y^x ( 1 / 3 ) =
or
Take the cube root of 40: Press 4 0 2nd cube-root = (the cube-root is the shifted function of the 0 key)
or
Take the third root of 40: Press 4 0 2nd xth-root 3 = (the xth-root is the shifted function of the y^x key, located just above the divide key)

Mar 14, 2012 | Texas Instruments TI-30XA Calculator

### How can I find the square root of 39 on my ti-30xa? Also I would like to know how to find the cube of 9482... Help

Square root of 39: Press 3 9 [square-root] =
[square-root] is the key just to the left of the divide key.

Cube root of 9482: Press 9 4 8 2 2nd [cube-root] =
[cube-root] is the shifted function of the 0 key.

For other roots, you can use the [nth-root] function, the shifted function of the key above the divide key. For example, to calculate the fourth root of 16, press 1 6 2nd [nth-root] 4 =

Aug 11, 2011 | Texas Instruments TI-30XA Calculator

### Detailed instructions on how the take the cubic root of a number. example 1728 = r^3.

The cube root is the fourth item in the MATH menu. To calculate the cube root of 1728, press
MATH 4 1 7 2 8 ENTER.

Jun 02, 2011 | Texas Instruments TI-84 Plus Calculator

### How do i use the cube root function? i can find the square root function, but at present it does not seem that the calculator has a cube root function.

There's a cube root function as the fourth item in the MATH menu. The fifth item is a general root function.

For example, to calculate the cube root of 8, press MATH 4 8 ENTER

Feb 21, 2011 | Texas Instruments TI-84 Plus Calculator

### Hi is there a function for finding the cubed root/custom root on the Texas Instruments ba-ii Plus Calculator

You can calculate any root by raising to the reciprocal. For example, to calculate the cube root of 125, press 1 2 5 y^x 3 1/x =

To calculate the fourth root of 16, press 1 6 y^x 4 1/x =

The y^x key is just above the 9 key. The 1/x key is just above that.

Jun 13, 2010 | Texas Instruments BA-II Plus Calculator

### Finding a cube root on calculator

You can calculate cube roots by using the cube root function (the 2nd-shift of the 0 key). You can calculate arbitrary roots by using the x-root function (the 2nd-shift of the y^x key, just above the divide key).

May 27, 2010 | Texas Instruments TI-30XA Calculator

### I need to know how to enter anything above cube root into my TI-83.

1. Use the universal power key marked with [^].
2. To avoid problems if the exponent is an expression, enclose it in parentheses.
3. To enter any power type number^(exponent)
4. If exponent is negative use the (-) change sign key next to the dot, below the 3 key.
5. To calculate the roots (cubic, fourth, fifth, etc.) roots use the fact that a root of n-th order can be represented as ^(1/n)
6. Ex: cube root of 27: 27^(1/3); square root of 64 : 64^(1/2) or 64^(0.5)

Feb 26, 2010 | Texas Instruments TI-83 Plus Calculator

### How to find cube root.

Hello,
What we call roots: square, cube ,fourth roots, etc. can be shown in algebra to be equiavlent to powers with fractionary exponents where numerator is 1 and denomonator an integer.
square root of a = a to the power 1/2
cube root of a = a to the power 1/3
n-th root of a = a raised to the power 1/n, n integer different from 0.

How to use calculator to calculate cube root?
If you do not have a specific (shortcut) key for it you use the key to raise to an arbitrary power [^ ], sometimes shown as [x^y]. The exponent will be 1/3. Do not replace 1/3 by its decimal approximate.

Cube root of 27 is entered as 27 [^ ] (1/3)

Hope it helps.

Sep 13, 2009 | Texas Instruments TI-86 Calculator

### Cube root

You can multiply a number by 1/3rd to get the cube root or

Under the MATH button, the fourth option down will give you cube root. Any n root beyond that will require the x^(1/n) method.

Feb 12, 2009 | Texas Instruments TI-83 Plus Calculator

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