Réponses

2014-09-15T17:48:59+02:00
5x² + 13x
= x (5x + 13)

x (5x + 13) = 0
x = 0 ou 5x+13 = 0
x = 0 ou 5x = -13
x = 0 ou x = -13/5
2014-09-15T17:50:24+02:00
5x² + 13x
x(5x + 13)

5x
² + 13x = 0
x(5x + 13)
x = 0 ou 5x + 13 = 0
x = 0 ou 5x = -13
x = 0 ou x = -13/5