Réponses

2013-10-23T10:29:15+02:00
4(3 - x²) + 5x² = 6x² - 3(8x² - 10)
x = -3 rac(2/19) ou x = 3 rac(2/19)

x(x - 1) + 2x(x + 3) =0
x=-5/3 ou x=0

(x - 1)² + 4(x - 1)(x + 5) = 0
x=-19/5 ou x=1

4x² - (3x + 1)² = 0
x=-1 ou x=-1/5

x(x - 4) - 5(4 - x) = 0
x=-5 ou x=4

4x² + 20x + 25 = 0
x=-5/2

(x + 5)² - (2x + 7)² = 0
x=-4 ou x=-2