Bonsoir
Développer et réduire.
A = (x + 3) (x + 4)
A = x^2 + 4x + 3x + 12
A = x^2 + 7x + 12
B=(2 x - 3)(-x+2)
B = -2x^2 + 4x + 3x - 6
B = -2x^2 + 7x - 6
C=(-4x+3) (2 x + 1)
C = -8x^2 - 4x + 6x + 3
C = -8x^2 + 2x + 3
D=(7 x-2)(5 x - 4)
D = 35x^2 - 28x - 10x + 8
D = 35x^2 - 38x + 8
E=(-3 x - 4) (8 x - 7)
E = -24x^2 + 21x - 32x + 28
E = -24x^2 - 11x + 28
