Réponse :
Bonjour,
A = 8(-2x +9)
A = 8*(-2x) + 8*9
A = -16x + 72
C = 5(3x + 2) – 2(4 – x)
C = 5*3x + 5*3 - 2*4 - 2*(-x)
C= 15x + 15 - 8 + x
C= 16x + 7
B = 4(2x – 3) - 9x
B = 4*2x + 4 *(-3) -9x
B = 8x -12 - 9x
B = -x -12
D = -x(x + 3) + 4(x + 2)
D = -x*x -x*3 + 4*x + 4*2
D = [tex]-x^{2}[/tex] - 3x + 4x + 8
D = [tex]- x^{2}[/tex] + x + 8