Réponse :
Bonjour
Explications étape par étape
A = 5x(x+1)
A = 5x^2 + 5x
B = (x+2)(2x+1)
B = 2x^2+x+4x+2
B = 2x^2 + 5x + 2
C = (3-2x)(x-8)
C = 3x-24-2x^2+16x
C = -2x^2+19x-24
D = (x-3)^2
D = x^2 - 2*x*3+3^2
D = x^2 - 6x + 9
E = 8(x+2) + (4x+1)(2x-3)
E = 8x+16 + 8x^2 - 12x + 2x - 3
E = 8x^2 - 2x + 13
