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OpenStudy (anonymous):
This is false right?: 4x2 + 4x + 1 = (2x + 1)2
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OpenStudy (dape):
Nope, that holds for all x.
OpenStudy (dape):
Proof: \[ (2x+1)^2=(2x+1)*(2x+1)=2x*2x+2x*1+1*2x+1*1 \\ = 4x^2+4x+1 \]
OpenStudy (anonymous):
Thnk u.
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