Bonjour,
Réduire:
D= - 11x²+7-2x-4(5x²)+8x
D= -11x²+6x-20x²+7
D= - 31x²+6x+7
**** -11-20= - 31
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Bonjour,
Réduire:
D= - 11x²+7-2x-4(5x²)+8x
D= -11x²+6x-20x²+7
D= - 31x²+6x+7
**** -11-20= - 31