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OpenStudy (anonymous):
(2x-1/2 )2
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OpenStudy (anonymous):
(2x-1/2)^2
hero (hero):
(2x-1/2)^2 =(2x-1/2)(2x-1/2) =2x(2x-1/2)-1/2(2x-1/2) =4x^2 - x - x +1/4 = 4x^2 - 2x + 1/4
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