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Sagot :

VINS

bonsoir

A = x² + 2 x + 3 x + 6 = x² + 5 x + 6

B = 2 x² + 4 x + 6 x + 12 = 2 x² + 10 x + 12

C = x² + 9 x - 7 x - 63 =  x² + 2 x - 63

D = 4 x - x² - 12 + 3 x = - x² + 7 x - 12

MARIEJOE57

Réponse :

bonsoir

Explications étape par étape :

A = (x + 3)(x + 2)

=x²+2x+3x+6

=x²+5x+6

B = (x + 3)(2 x + 4)

=2x²+4x+6x+12

=2x²+10x+12

=2(x²+5x+6)

C = (x-7)( x +9)

=x²+9x-7x-63

=x²+2x-63

D = (x-3)(4 - x)

=4x-x²-12+3x

=-x²+7x-12

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