# Math Help - Find x

1. ## Find x

Find $-x^2$ when x=2

Is it 4 or -4?

2. Originally Posted by jkami
Find $-x^2$ when x=2

Is it 4 or -4?
Are you asked to find (-x)^2 or -(x^2)? Which of these do you think -x^2 would mean?

3. Originally Posted by jkami
Find $-x^2$ when x=2

Is it 4 or -4?
$-x^2 = -(x^2)$ by associative law. Thus we have $-(2^2) = -4$.

4. Originally Posted by jkami
Find $-x^2$ when x=2

Is it 4 or -4?
Initially,do the $2^2$,which equates to 4.
Thereupon,you can espy that $-x$ is a negative one.

Thereby, ultimately you compute $,-x$ times 4= -4