What is sqrt((-9)^2)?

2 Answers
Apr 11, 2018

The result is 9.

Explanation:

To simplify squares inside radicals, take the absolute value of what is being squared, like this:

sqrt(x^2)=|x|

This is because a square root cannot equal a negative number. Here's is your expression:

color(white)=sqrt((-9)^2)

=|-9|

=9

That's the result. You can check using a calculator:

https://www.desmos.com/calculatorhttps://www.desmos.com/calculator

Hope this helped!

Apr 11, 2018

+-9

Explanation:

sqrt((-9)^2)
=sqrt81
=+-9