déveloper chaque expression ex 10 , 11

Bonsoir,

2(x + 3) = 2 * x + 2 * 3 = 2x + 6

-2(x - 6) = -2 * x - 2 * -6 = -2x + 12

-3(y + 5) = -3 * y - 3 * 5 = -3y - 15

-3y(-9 - y) = -3y * -9 - 3y * -y = 27y + 3y^2

N°11 :

3a(x - 2) = 3a * x + 3a * -2 = 3ax - 6a

x(2 - 5x) = 2x - 5x^2

-3x(x + 5) = -3x^2 - 15x

-5b(-a + b) = 5ab - 5b^2