How do I calculate roots with the 15c

Calculators
Thread starter hatelove
Start date May 12, 2012
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Roots

In summary, the 15c calculator uses Reverse Polish Notation (RPN) for inputting numbers, and you must enter the number first followed by the "ENTER" key before any operation. To find the square root of a number on the 15c calculator, use the "SQRT" function, and for other roots, use the "xroot" function. To calculate multiple roots, use the "yx" function. The difference between the square root function and the exponent function is that the former is only for square roots while the latter can be used for any root and other calculations like finding powers.

May 12, 2012

hatelove

I'm trying to calculate the cube root of -8, for example, so I type in these buttons:

8
CHS (change sign)
Enter
3
1/x
y^x

But it gives me an error. What is the correct way to go about doing this?

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May 12, 2012

I like Serena

Homework Helper

MHB

You won't be able to calculate ##\sqrt[3]{-8}##.
If you want it, calculate ##-\sqrt[3]{8}##.

Calculators can't take roots of negative numbers.

FAQ: How do I calculate roots with the 15c

How do I input a number into the 15c calculator?

The 15c calculator uses Reverse Polish Notation (RPN) for inputting numbers. This means you must enter the number first, followed by the "ENTER" key, before entering any operation. For example, to enter 5 into the calculator, you would press "5" then "ENTER".

How do I enter a square root on the 15c calculator?

To calculate a square root on the 15c calculator, you must use the "SQRT" function. This is done by entering the number you want to find the square root of, followed by the "SQRT" key. For example, to find the square root of 25, you would enter "25" then "SQRT".

Can I calculate roots other than square roots on the 15c calculator?

Yes, the 15c calculator has multiple root functions, including square root, cube root, and 4th root. To calculate a root other than a square root, you must use the "xroot" function. For example, to find the cube root of 27, you would enter "27" then "xroot" followed by "3".

How do I calculate multiple roots on the 15c calculator?

To calculate multiple roots on the 15c calculator, you must use the "yx" function. This function allows you to input the base number first, followed by the exponent. For example, to calculate the 4th root of 16, you would enter "16" then "yx" followed by "4".

What is the difference between using the square root function and the exponent function on the 15c calculator?

The square root function on the 15c calculator is specifically used for finding the square root of a number. The exponent function, on the other hand, can be used for finding any root by inputting the base number first and then the exponent. Additionally, the exponent function can also be used for other calculations, such as finding the power of a number.