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Math Help - Find x

  1. #1
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    Find x

    Find -x^2 when x=2

    Is it 4 or -4?
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  2. #2
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    Quote Originally Posted by jkami View Post
    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?
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  3. #3
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    Quote Originally Posted by jkami View Post
    Find -x^2 when x=2

    Is it 4 or -4?
     -x^2 = -(x^2) by associative law. Thus we have  -(2^2) = -4 .
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  4. #4
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    Quote Originally Posted by jkami View Post
    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
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