Bonjour, pouvez vous m'aidez svp ?​

Bonjour,

Factorise les expressions suivantes :

a. (x - 3) (2x + 1) + (x - 3) (5x - 7)

= (x - 3) (2x + 1 + 5x - 7)

= (x - 3) (2x + 5x + 1 - 7)

= (x - 3) (7x - 6)

b. (5x - 6) (11x + 6) + 8 (11x + 6)

= (11x + 6) (8 + 5x - 6)

= (11x + 6) (5x + 2)

c. (7x² - 5) (3x + 9) + (7x - 12) (3x + 9)

= (3x + 9) (7x² - 5 + 7x - 12)

= 3 (x + 3) (7x² + 7x - 5 - 12)

3 (x + 3) (7x² + 7x - 17)

d. (8x - 5) (14x + 5) + (14x + 5)²

= (14x + 5) (14x + 5 + 8x - 5)

= (14x + 5) (14x + 8x + 5 - 5)

= 22x (14x + 5)

Bonjour,

Factoriser les expressions:

• (x-3)(2x+1)+(x-3)(5x-7)

(x-3)(2x+1+5x-7)

(x-3)(7x-6)

• (5x-6)(11x+6)+8(11x+6)

(11x+6)(5x-6+8)

(11x+6)(5x+2)

• (7x²-5)(3x+9)+(7x-12)(3x+9)

(3x+9)(7x²-5+7x-12)

(3x+9)(7x²-7x-17)

• (8x-5)(14x+5)+(14x+5)²

(14x+5)(8x-5+14x+5)

(14x+5)(22x)

22x (14x+5)