Bonsoir, j’aurais besoin d’aide pour cet exercice svp merci d’avance !!! (La 1, la 2 et la 3 si vous comprenez svp) ;)

Bonjour,

1) A = 5(x-9) = 5*x-5*9 = 5x-45

  B = (a+8)(b-2) = a*b-a*2+8*b-8*2 = ab-2a+8b-16

  C = -6(y-1) = -6*y-6*(-1) = -6y+6

  D = x-(x²+6) = x-x²-6

2) E = 9x²-6 = 3(3x²-2)

   F = 21-7x = 7(3-x)

   G = 13+130y = 13(1+10y)

   H = 5(4+x)-x(4+x) = (4+x)(5-x)

3) I = 6x²+4-2x-8x²+2x = -2x²+4

   J = 8a-3b+3+b+1 = 8a-2b+4

   K = -13x²+7x+12x²-3 = -x²+7x-3