Sagot :
Bonjour,
(x+12) (x+2) = 0
x + 12 = 0 ou x + 2 = 0
x = - 12 x = - 2
7x-4=5x
7x - 5x = 4
2x = 4
x = 4/2
x = 2
3-2x=-9+3x
- 2x - 3x = - 9 - 3
- 5x = - 12
x = 12/5.
(3x - 5)² = 9x² - 30x + 25
Bonjour,
(x+12) (x+2) = 0
x + 12 = 0 ou x + 2 = 0
x = - 12 x = - 2
7x-4=5x
7x - 5x = 4
2x = 4
x = 4/2
x = 2
3-2x=-9+3x
- 2x - 3x = - 9 - 3
- 5x = - 12
x = 12/5.
(3x - 5)² = 9x² - 30x + 25