Réponse :
Explications étape par étape
Bonjour
Exercice 3 :
Factoriser :
A = 9x - 6x^2
A = 3x * 3 - 3x * 2x
A = 3x(3 - 2x)
B = (a + 5)(2a + 3) + (a + 5)^2
B = (a + 5)(2a + 3 + a + 5)
B = (a + 5)(3a + 8)
C = (3b + 2)(3b - 2) + 5b(3b - 2)
C = (3b - 2)(3b + 2 + 5b)
C = (3b - 2)(8b + 2)
C = 2(3b - 2)(4b + 1)
D = (y - 5)(3y + 4) - (y - 5)(4y - 3)
D = (y - 5)(3y + 4 - 4y + 3)
D = (y - 5)(-y + 7)
E = (4y - 3) + (4y - 3)(y + 1)
E = (4y - 3)(1 + y + 1)
E = (4y - 3)(y + 2)
