Originally Posted by

**benny92000** Here is the problem: x^(2) ^(1/2) (That's the square root of x squared) = -x consists of ?

A. zero only

B. nonpositive real numbers only

C. positive real numbers only

d. all real numbers

e. no real numbers

Explanation: Choice B is correct. Every positive number n hast two square roots, one positive and the other negative, but the square root of n denotes the positive number whose square is n.

Why does it only denote the positive number? I am used to puttingi + or - whenever I take the square root of something. I just want to understand this clearly. If I wanted to simplify it more, could I also do that to solve? Thanks.