Réponse :
A = -5(x + 4) = -5*x -5*4 = -5x - 20
B = -3(x - 2) = -3*x -3*(-2) = -3x + 6
C = -4(5x - 1) = -4*5x -4*(-1) = -20x + 4
D = -x(2 - 4x) = -x*2 -x*(-4x) = -2x + 4x²
E = -2x(x - 3) = -2x*x -2x*(-3) = -2x² + 6x
F = 7x(3x - 5) = 7x*3x + 7x*(-5) = 21x² - 35x
j'espère t'avoir aidé !
