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Diamants
@Diamants
April 2019
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Bonjour j'ai une expression dans mon devoir de maths que je n'arrive pas à factoriser :
B(x) = (8x+3)²-(5x-4)²-(3x+7)
Si vous savez comment faire, pouvez vous m'aidez s'il vous plait ? (Je suis en 2nde)
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Verified answer
B(x) = (8x+3)²-(5x-4)²-(3x+7)
=64x²+48x+9-25x²+40x-16-3x-7
=39x²+85x-14
=(3x+7)(13x-2)
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Verified answer
B(x) = (8x+3)²-(5x-4)²-(3x+7)=64x²+48x+9-25x²+40x-16-3x-7
=39x²+85x-14
=(3x+7)(13x-2)