ANDREADUP20 ANDREADUP20 Mathématiques Answered Exercice 3: Developper et réduire A = 5x(x + 3) + 9x²(x+3) C = 8(5-x)+5-x B = (2-x) x 4x - 7(2-x) D = 2x +3+x(2x + 3)
