Bonjour,
Supprimer les parenthèses et réduire chaque expression
A=(3X+5)-(4X-2)
A = 3x + 5 - 4x + 2
A = 3x - 4x + 5 + 2
A = - x + 7
B=(-9X+1)+(4-5X)
B = - 9x + 1 + 4 - 5x
B = - 9x - 5x + 1 + 4
B = - 14x + 5
C=-(10X+3)-(4X+8)
C = - 10x - 3 - 4x - 8
C = - 10x - 4x - 3 - 8
C = - 14x - 11
D=(X-7)-(4X-3
D = x - 7 - 4x + 3
D = x - 4x - 7 + 3
D = - 3x - 4.