Bonjour Développer et réduire les expressions suivantes Merci d’avance

Bonjour,

A = 8 + 2(x - 3)

A = 8 + 2 * x + 2 *(-3)

A = 8 + 2x - 6

A = 2x + 2

B = 5x(2x-6)

B = 5x * 2x + 5x * (-6)

B = 10x² - 30x

C = (-4-3x) * 2

C = 2 * (-4) + 2 * (-3x)

C = -8 -6x

C = - 6x - 8

D = -3(4 - x²)

D = -3 * 4 - 3 * (-x²)

D = -12 + 3x²

D = 3x² - 12

E = 10x - 3(4x -7) + 9

E = 10x - 3 * 4x - 3 * (-7) + 9

E = 10x -12x + 21 + 9

E = -2x + 30

F = (4x² - 3) * 2 + 4x

F = 2 * 4x² + 2 * (-3) + 4x

F = 8x² - 6 + 4x

F = 8x² + 4x - 6