Bonsoir,
D=4(x+3)+2(5x-4);
D = 4 * x + 4 * 3 + 2 * 5x + 2 * (-4)
D = 4x + 12 + 10x - 8
D = 14x + 4
E=5(x-2) +5(x-7);
E = 5 * x + 5 * (-2) + 5 * x + 5 * (-7)
E = 5x - 10 + 5x - 35
E = 10x - 45
F=2(y-5)-6(1+2y).
F = 2 * y + 2 * (-5) - 6 * 1 - 6 * 2y
F = 2y - 10 - 6 - 12y
F = 10y - 16
Bonne soirée.
