Pouvez vous m aider svp

Réponse:

Bonsoir

a. (2x-3)(x+2)-5(2x-3)

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

(2x-3)(x-3)

b. (5x+1)(3x-5)-(x-3)(5x+1)

(5x+1)(3x-5-(x-3))

(5x+1)(3x-5-x+3)

(5x+1)(2x-2)

c. (3x+2)(-5x-7)-(3x+2)(x+7)

(3x+2)(-5x-7-(x+7))

(3x+2)(-5x-7-x-7)

(3x+2)(-6x-14)

d. (5x-8)(7x-3)-(7x-3)^2

(7x-3)(5x-8-(7x-3))

(7x-3)(5x-8-7x+3)

(7x-3)(-2x-5)

Voilà