bonjour
( 5 x - 1 ) + ( x + 3 ) = 0
5 x - 1 + x + 3 = 0
6 x = - 3 + 1
6 x = - 2
x = - 2/6 = - 1/3
12 + x = 0
x = - 12
7 x - 2 = 0
7 x = 2
x = 2/7
( x /4 ) : 11 ou x ( 4 /11 ) ?
x/5 = x + 2/7
7 x /35 = 35 x / 35 + 10/35
7 x - 35 x = 10
- 28 x = 10
x = - 2.8
3 x ( 2 x + 2 ) ( 4 x - 9 ) = 0
un des facteurs = 0
donc 3 solutions
x = 0
ou x = - 1
ou x = 9/4 = 3/2
