bonjour
a ) x + 3 + x - 4 = 0
2 x = - 3 + 4
2 x = 1
x = 1/2
b ) 2 x² - 5 x = 0
x ( 2 x - 5 ) = 0
x = 0 ou 5/2
c) ( x + 1 ) ( x - 5 ) = 0
x = - 1 ou 5
d) 4 x² - 5 = 6 x + 4 x²
4 x² - 4 x² - 6 x = 5
- 6 x = 5
x = - 5/6
e ) (x + 1 ) ( x + 2 ) = 2
x² + 2 x + x + 2 - 2 = 0
x² + 3 x = 0
x ( x + 3 ) = 0
x = 0 ou - 3
f ) ( 3 x- 5 )² = 0
x = 5/3