Bonsoir
Développer et réduire les expressions suivantes.
A = (7x + 3)(x + 5)
A = 7x^2 + 35x + 3x + 15
A = 7x^2 + 38x + 15
C = (3x + 1)(-5x + 3)
C = -15x^2 + 9x - 5x + 3
C = -15x^2 + 4x + 3
E = (-4x-2)(-x + 8)
E = 4x^2 - 32x + 2x - 16
E = 4x^2 - 30x - 16
B=(5-2x)(3x-6)
B = 15x - 30 - 6x^2 + 12x
B = -6x^2 + 27x - 30
D=(7x - 2)²
D = 49x^2 - 28x + 4
F= 4(2x - 1)(-x + 3)
F = 4(-2x^2 + 6x + x - 3)
F = 4(-2x^2 + 7x - 3)
F = -8x^2 + 28x - 12
