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Sagot :

VINS

bonjour

B  = 21 x - 35 - 6 x² + 10 x

B = - 6 x² + 31 x - 35

Bonsoir,

double distributivité

7*3x = 21x

7*-5 = -35

-2x*3x = -6x²

-2x* -5 = 10x

=>

-6x² +21x +10x -35

-6x² +31x  -35

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