Réponse :
57/ a. 5x + 5b = 5(x + b)
b. 3x - 3y = 3(x - y)
c. 4x² - 3x² = x² (4 - 3) = x²(1) = x*x
d. 5,2x + 2,1x = x(5,2 + 2,1) = x(7,3)
58/ a. 2x + 2 = 2(x+1)
b. 3 - 3y = 3(1-y)
c. 4x² - 4 = 4(x²-1)
d. x - 20x = x(1 - 20) = x*(-20)
59/ a. 2x - 10 = 2(x-5)
b. 4y + 16 = 4(y+4)
c. 6y + 12x = 6(y+2x)
d. 5b - 25a = 5(b-5a)
60/ a. 2x² + 3x = x(2x+3)
b. xy - 5y = y(x-5)
c. 7x^3 - x² = x²(7x-1)
d. 8a² + a^3 = a²(8+a)
61/ a. 5x + 15x² = 5x(1 + 3x)
b. -3y - 6y² = -3y(1+2y)
c. 8a - 2a² = 2a(4-a)
d. 5ab - 25a = 5a(b-5)
Explications étape par étape :
