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OpenStudy (anonymous):
Find the following product:(x-2)(x+2) A. x^2+4x-4 B.x^2-4 C.x^2+4 D.x^2-4x-4
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OpenStudy (anonymous):
Use FOIL to expand. \[x ^{2}+2x-2x-2^{2}\]
OpenStudy (anonymous):
b
OpenStudy (anonymous):
(x-2)(x+2) Foil: \[x\ \times\ x\ =x ^{2}\] \[x\ \times\ 2 = 2x\] \[-2\ \times\ x = -2x\] \[-2\ \times\ 2 = -4\] Answer: \[x ^{2}+2x-2x-4\]Final Answer\[x ^{2}-4\] Since 2x-2x cancel each other out. So the answer is b.
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