Bonjour,
Factoriser:
A=13(x+2) + 5(x+2)= (x+2)(13+5)= 18(x+2)
B = 3x(x + 2)-5(x + 2) = (x+2)(3x-5)
C= -6(3x-2) - (3x-2)(x-4)= - (3x-2)(x-4+6)= - (3x-2)(x+2)
D = (2x + 1)(x-5)-(3x + 1)(2x + 1)= (2x+1)(x-5-3x-1)= (2x+1)(-2x-6)= - 2(2x+1)(x+3)
E = (x+1)(2x-5)+(2x-5)²= (2x-5)(x+1+2x-5)= (2x-5)(3x-4)
F = (4x+4)(1-2x)+(x+1)²= 4(x+1)(1-2x)+(x+1)²= (x+1)(4(1-2x)+x+1)= (x+1)(4-8x+x+1)
= (x+1)(-7x+5)= - (x+1)(7x-5)
