Bonjour,
Développer et réduire :
F = x * 2x
F = 2x^2
G = 9x * 6x
G = 54x^2
H = (-7x - 7)(8x + 6) - 7x^2
H = -56x^2 - 42x - 56x - 42 - 7x^2
H = -63x^2 - 98x - 42
I = 6 + (x + 4)(-9x - 8)
I = 6 - 9x^2 - 8x - 36x - 32
I = -9x^2 - 44x - 26
J = -5x - 9 + (10x + 9)(-10x - 4)
J = -5x - 9 - 100x^2 - 40x - 90x - 36
J = -100x^2 - 135x - 45