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Exercice 2:
Factoriser les expressions suivantes en utilisant la
méthode du facteur commun :
A = 12x - 36
B = 28x – 11 x2 + 5x2
C = (3 x + 7)(2 x – 4) + (3 x + 7)(5 x + 8)
D = (6x + 5)(3 x – 7) - (6 x + 5)(5 x – 7)​

Sagot :

FAMILYS

Bonjour,

A = 12x - 36

A = 12 * x - 12 * 3

A = 12(x - 3)

B = 28x - 11x² + 5x²

B = 28x - 6x²

B = 2x(14 - 3x)

C = (3x + 7)(2x - 4) + (3x + 7)(5x + 8)

C = (3x + 7)(2x - 4 + 5x + 8)

C = (3x + 7)(7x + 4)

D = (6x + 5)(3x - 7) - (6x + 5)(5x - 7)

D = (6x + 5)(3x - 7 - 5x + 7)

D = (-2x)(6x + 5)