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OpenStudy (anonymous):
Is this correct ? Simplify: (2x + 8)(2x - 8). 4x^2-16 ?
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OpenStudy (anonymous):
it's 4x^2 - 64 since 8^2 is 64 :D
OpenStudy (anonymous):
so when its in a equation like that you multiply instead of add ?
OpenStudy (anonymous):
yes the formula goes like this : (a+b)(a-b) = a^2 - b^2
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