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Sagot :

PAMC

Bonjour,

B=(x-1)(6x+3)+(2x+1)(3-x)

B=(x-1)3(2x+1)+(2x+1)(3-x)

B=(2x+1)[3(x-1)+(3-x)]

B=(2x+1)(3x-3+3-x)

B=(2x+1)(2x)

B=2x(2x+1)

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