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OpenStudy (anonymous):
(2x-4)(2x+4)
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OpenStudy (blurbendy):
(2x - 4)(2x +4) 4x^2 + 8x - 8x -16 4x^2 - 16 4(x^2 -4) 4(x +2)(x -2)
OpenStudy (whpalmer4):
Are you supposed to simplify it, or multiply it out? \[(2x-4)(2x+4)=4x^2-8x+8x-16=4x^2-16\]
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