Souligner le facteur commun puis factoriser. A = 2x(x + 1) + 2x(8x + 5) B = (x + 2)(3x + 4) + 3(x + 2) 1C = (1 + 2x)(6x - 9) + (4x - 2)(6x - 9) D = (6x + 6)(5x

A = 2x(x + 1) + 2x(8x + 5)

A= 2x(x+1+8x+5)

A= 2x(9x+3)

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

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

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

C= (1 + 2x)(6x - 9) + (4x - 2)(6x - 9)

C= (6x - 9)(1+2x+4x-2)

C= (6x - 9)(-1+6x)

D= (6x + 6)(5x - 5) - (5x - 5)(4x-4)

D= (5x - 5)(6x+6-(4x-4))

D= (5x - 5)(6x+6-4x+4)

D= (5x - 5)(2x+10)

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

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

E= (4x - 3)(9+2x)

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

F= (5x + 4)(2x-3-1)

F= (5x + 4)(2x-4)