bonjour
( 3 x + 2 )² = 4 ( 2 x - 3 )²
9 x² + 12 x + 4 = 4 ( 4 x² - 12 x + 9 )
9 x² + 12 x + 4 = 16 x² - 48 x + 36
9 x² - 16 x² + 12 x + 48 x = 36 - 4
- 7 x² + 60 x = 32
- 7 x² + 60 x - 32 = 0
- 7 ( x - 8 ) ( x - 4 /7) = 0
x - 8 = 0 ⇔ x = 8
ou x - 4 /7 = 0 ⇔ x = 4 /7
