Thread: square root and squares

Hello, I know that sqrt(x^2) = +/- x
is (sqrt(x))^2 the same thing or is the answer just x.
thanks
bill

Originally Posted by billq

Hello, I know that sqrt(x^2) = +/- x is \sqrt{x^2})the same thing or is the answer just x

The statement in red in incorrect.


This is true

thanks. so does (sqrt(x))^2 = |x| or just x ?

because must be non-negative.

great, thanks for the fast response.