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Factoriser chaque expression.
B={x+3)au carré - 64 

D= 4xau carré - 28x + 49

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B={x+3)au carré - 64  = (x+3+8)(x+3-8) = (x+11)(x -5)

D= 4xau carré - 28x + 49 = (2x -7)²