However, I'm told the correct answer is
Why instead of ?
Last edited by mt_lapin; Mar 16th 2008 at 04:05 PM.
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Remember, when you square a negative number, the result is always positive. In your numerator, you have (-4)². The answer to that is 16, not -16.
I think you got it from here.
Oh. You are absolutely right! I completely forgot about that.
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