Factorisation merci

Bonjour

factorisation :

A = (5x + 4)(x - 2) + (5x + 4)(8 - 3x)

A = (5x + 4)(x - 2 + 8 - 3x)

A = (5x + 4)(-2x + 6)

A = (5x + 4) * 2(-x + 3)

A = 2(5x + 4)(-x + 3)

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

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

B = (3x - 2)(-6x)

B = -6x(3x - 2)

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

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

C = (x + 4)(5x - 7)

D = 5(8 - 3x) - (-3x + 11)(8 - 3x)

D = (8 - 3x)(5 + 3x - 11)

D = (8 - 3x)(3x - 6)

D = (8 - 3x) * 3(x - 2)

D = 3(8 - 3x)(x - 2)

E = (4x - 21)(9x - 7) + (9x - 7)(-6x - 9)

E = (9x - 7)(4x - 21 - 6x - 9)

E = (9x - 7)(-2x - 30)

E = (9x - 7) * 2(-x - 15)

E = 2(9x - 7)(-x - 15)

F = (-7x + 1)(x + 2) - (-9 - 5x)(-7x + 1)

F = (-7x + 1)(x + 2 + 9 + 5x)

F = (-7x + 1)(6x + 11)