A=(2x-3)(x+5) B=2x-3(x+5) C=2x-(3x+5) D=(2x-3)x+5 Pouvez-vous m'aider svp

Bonjour,

(2x - 3)(x + 5) = 2x * x + 2x * 5 - 3 * x - 3 * 5 = 2x² + 10x - 3x - 15 = 2x² + 7x - 15

2x - 3(x + 5) = 2x - 3 * x - 3 * 5 = 2x - 3x - 15 = .........

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

x(2x - 3) + 5 = 2x * x + x * -3 + 5 = 2x² - 3x + 5