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Sagot :

MARIEJOE57

Réponse :

bonjour

Explications étape par étape :

A = 2(x + 11) + 5(x + 7)

=2*x +2*11 + 5*x +5*7

=2x+22+5x+35

=7x+57

B = 9(x + 4) + 3(2x - 7)

=9*x+9*4  + 3*2x+3*-7

=9x+36 +6x-21

=15x+15

=15(x+1)

C = x(3+5x) +x(6+x)

=3*x +5x*x +x*6 +x*x

=3x+5x²+6x+x²

6x²+9x

=3x(2x+3)

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