Sagot :
Re
3 x + 9 = 3 ( x + 3 )
5 x² + 7 x = x ( 5 x + 7 )
14 x - 12 = 2 ( 7 x - 6 )
- 2 x - 2 = - 2 ( x + 1 )
7 x + 7 x² = 7 x ( 1 + x )
14 - 21 x = 7 ( 2 - 3 x )
Re
3 x + 9 = 3 ( x + 3 )
5 x² + 7 x = x ( 5 x + 7 )
14 x - 12 = 2 ( 7 x - 6 )
- 2 x - 2 = - 2 ( x + 1 )
7 x + 7 x² = 7 x ( 1 + x )
14 - 21 x = 7 ( 2 - 3 x )