Réponses

2014-09-06T11:32:41+02:00
Bonjour

Factorisons
C(x) = 3(x-5)^2 + (2x-10) (3x+1)
C(x) = 3(x-5)(x-5) + 2(x-5)(3x+1)
C(x) = (x-5)[3(x-5)+2(3x+1)]
C(x) = (x-5)(3x - 15 + 6x + 2)
C(x) = (x-5)(9x-13)