Sagot :
E = 2(x + 5) = 2*x + 2* 5 = 2x + 10
F = 5(3x – 4y) = 5*3x + 5*(-4y) = 15x - 20y
G = b(2a + b - 1) = b*2a + b*b + b*(-1) = 2ab + b² - b
E = 2(x + 5) = 2*x + 2* 5 = 2x + 10
F = 5(3x – 4y) = 5*3x + 5*(-4y) = 15x - 20y
G = b(2a + b - 1) = b*2a + b*b + b*(-1) = 2ab + b² - b