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

2 Answers
Apr 11, 2018

The result is 99.

Explanation:

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

sqrt(x^2)=|x|x2=|x|

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

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

=|-9|=|9|

=9=9

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

![https://www.desmos.com/calculator](useruploads.socratic.org)

Hope this helped!

Apr 11, 2018

+-9±9

Explanation:

sqrt((-9)^2)(9)2
=sqrt81=81
=+-9=±9