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Sagot :

Bonjour,

(2x+1)×2x+4(-4x+4)(2x+1)

(2x+1)×2x = 4x² +2x

4(-4x+4) = -16x²+16

(-16x²+16)(2x+1)=-32x³ -16x² +32x +16

4x² +2x - 32x³-16x² +32x +16

= -32x³ -12x²  +34x +16

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