Sagot :
Bonjour,
Développer:
1. (x-2) (x-3) = (x-5) (x-1)
x²-2x-3x+6= x²-5x-x+5
x²-5x+6= x²-6x+5
x²-5x+6-x²+6x-5= 0
x+1= 0
2. 5x² = 3x
5x²-3x= 0
x(5x-3)= 0
bonjour
( x - 2) ( x - 3 ) = ( x - 5) ( x - 1)
( x -2 ) ( x - 3) - ( x - 5 ) ( x - 1 ) = 0
x² - 3 x - 2 x + 6 - ( x² - x - 5 x + 5 ) = 0
x² - 5 x + 6 - x² + 6 x - 5 = 0
x = 5 - 6
x = - 1
5 x² = 3 x
5 x² - 3 x = 0
x ( 5 x - 3 ) = 0
soit x = 0
soit 5 x - 3 = 0 ⇔ x = 3/5