A(x) = x² + 2x = x(x+2)
B(x) = 7x(x - 4) + (x - 4)²=(x+4)(8x-4)
D(x) = (x + 1)(2x + 5) - (x + 1)(3x - 4)=(x+1)(-x+4)
E(x) = 16x²-1= (4x+1)(4x-1)
F(x) = 25 - (2x - 1)²= (4+2x)(6-2x)
G(x) = (2 - x)(3x + 1) + (3x + 1)= (3x+1)(3-x)
Explications étape par étape :