Réponses

  • Utilisateur Brainly
2014-09-27T15:11:06+02:00
1) K= (x - 3)(4x - 1) + (x - 3)(4x + 1)

2) K= (x - 3)(4x - 1) + (x - 3)(4x + 1)
K= (x - 3)(4x - 1 + 4x + 1)
K= (x - 3)(8x)

3) (x - 3)(8x) = 0
x - 3 = 0   ou   8x = 0
x = 3        ou    x = 0
2014-09-27T16:32:17+02:00
Bonjour K = (x-3)(4x-1)+(x-3)(4x+1) K =(x-3)[(4x-1)+(4x+1)] K =(x-3)(4x-1+4x+1) K = (x-3)8x K = 8x(x-3) Pour x = 0, K = 8(0)(0-3) = 0 x (-3) = 0 K = 0