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Math Help - Easy Simplification help

  1. #1
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    Easy Simplification help

    so I have this
    -2 - [1 - 2]^2

    the answer is -1
    this is where i get confused... i know that 1 - 2 is -1, square that -1^2 is positive 1 so it's going to look like this.... -2 - 1.... why am i getting -3 when the correct answer is -1....

    the original equation is this, (-2y)(-2x) - [1 - 2x - 2y]^2...... where you plug in values of x and y...... x=0 and y=1
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  2. #2
    Senior Member MacstersUndead's Avatar
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    Re: Easy Simplification help

    Let f(x,y) = (-2y)(-2x) - [1 - 2x - 2y]^2, then

    f(0,1) = (-2*1)(-2*0) - [1 - 2*0 - 2(1)]^2 = (-2)(0) - [1 - 0 - 2]^2 = 0 - [-1]^2 = -1
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  3. #3
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    Re: Easy Simplification help

    thank you!!!
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