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EXERCICE 5
Factoriser les expressions suivantes comme dans l'exemple :
A = 13(x + 2) + 5(x + 2)
B = 7(2x - 3) + 2(2x - 3)
Z = (x + 1905 + 3)
= B(x + 1)
C = 3x(x + 2) - 5(x + 2)
D = 4(x + 3) + 9x(x + 3)
E = 7x(3x + 1) - 10X(3x + 1)

Sagot :

Réponse :

A = 13(x + 2) + 5(x + 2)

A = (x + 2)(13 + 5)

A = 18(x + 2)

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

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

B = 9(2x - 3)

C = 3x(x + 2) - 5(x + 2)

C = (x + 2)(3x - 5)

D = 4(x + 3) + 9x(x + 3)

D = (x + 3)(4 + 9x)

E = 7x(3x + 1) - 10x(3x + 1)

E = (3x + 1)(7x - 10x)

E = -3(3x + 1)

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