bonsoir, pourriez vous m'aider svp factoriser les expressions a = (x-3)(2x+1)+7(2x+1) b = (x+1)(x+2)-5(x+2) c =(3-x)(4x+1)-8(4x+1) d = 5(1+2x)-(x+1)(1+2x) e = -

Bonsoir,

a = (x-3)(2x+1)+7(2x+1)
a = (2x + 1)(x - 3 + 7)
a = (2x + 1)(x + 4)

b = (x+1)(x+2)-5(x+2)
b = (x + 2)(x + 1 - 5)
b = (x + 2)(x - 4)

c =(3-x)(4x+1)-8(4x+1)
c = (4x + 1)(3 - x - 8)
c = (4x + 1)(-x - 5)

d = 5(1+2x)-(x+1)(1+2x)
d = (1 + 2x)(5 - x - 1)
d = (1 + 2x)(-x + 4)

e = -6(3x-2)-(3x-2)(x-4)
e = (3x - 2)(-6 - x + 4)
e = (3x - 2)(-x - 2)