Bonsoir,
Développer et réduire:
F = x(x + 6) - x
F = x*x + x*6 - x
F = x² + 6x - x
F = x² + 5x
G = 2x(x + 1) - 4x²
G = 2x*x + 2x*1 - 4x²
G = 2x² + 2x - 4x²
G = -2x² + 2x
H = x(y - 2) + xy
H = x*y - x*2 + xy
H = xy - 2x + xy
H = 2xy - 2x
I = 3x(x + 4) - 6,72
I = 3x*x + 3x*4 - 6,72
I = 3x² + 12x - 6,72
I = 3x² + 12x - 6,72
* = multiplication
Bonne soirée.