Réponse :
écriture sans le signe multiplier, on obtient:
A = 3x + 5
B = 8 - 2x
C = 4(2x - 3)
D = 4x(x - 1)
E = 2x(5x - 3)
si x = 3
alors
A = 3*3 + 5 = 9 +5 = 14 * signifie multiplier
B = 8 - 2*3 = 8 - 6 = 2
C = 4(2*3 - 3) = 4(6 - 3) = 4*3 = 12
D = 4*3(3 - 1) = 12*2 = 24
E = 2*3(5*3 - 3) = 6(15 -3) = 6*12 = 72
si x = -2
alors
A = 3(-2) + 5 = -6 +5 = -1
B = 8 - 2(-2) = 8 +4 = 12
C = 4[2(-2) - 3] = 4(-4 -3) = 4*(-7) = -28
D = 4(-2)(-2 - 1) = -8*(-3) = 24
E = 2(-2)[5(-2) - 3] = -4(-10 -3) = -4*(-13) = 52
j'espère avoir aidé
