Find $\displaystyle -x^2$ when x=2 Is it 4 or -4?
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Originally Posted by jkami Find $\displaystyle -x^2$ 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?
Originally Posted by jkami Find $\displaystyle -x^2$ when x=2 Is it 4 or -4? $\displaystyle -x^2 = -(x^2) $ by associative law. Thus we have $\displaystyle -(2^2) = -4 $.
Originally Posted by jkami Find $\displaystyle -x^2$ when x=2 Is it 4 or -4? Initially,do the $\displaystyle 2^2$,which equates to 4. Thereupon,you can espy that $\displaystyle -x$ is a negative one. Thereby, ultimately you compute$\displaystyle ,-x $ times 4= -4