Bonsoir, pouvez m’aider pour ces 4 équations ? Merci d’avance.

bonjour

8 x² = 10 x

8 x² - 10 x = 0

2 x ( 4 x - 5 ) = 0

x = 0 ou 5/4

( 2 x - 3 )² = 4 x²

( 2 x - 3 )²- 4 x² = 0

( 2 x - 3 - 2 x ) ( 2 x - 3 + 2 x ) = 0

- 3 ( 4 x - 3 ) =0

x = 3/4

( x + 3/2 )² = ( 2 x - 1/3 ) ²

( x + 3/2)² - ( 2 x - 1/3 )² = 0

( x + 3/2 + 2 x - 1/3 ) ( x + 3/2 - 2 x + 1 /3 ) = 0

( 3 x +  7/6 ) ( - x + 11/6 ) = 0

x =  - 7/18 ou  11/6

9 x² - 49 = ( x - 1 ) ( 3 x + 7 )

( 3 x - 7 ) ( 3 x + 7 ) - ( x - 1 ) ( 3 x + 7 )  = 0

( 3 x + 7 ) ( 3 x - 7 - x + 1 ) = 0

( 3 x + 7 ) ( 2 x - 6 ) = 0

2 ( 3 x + 7 ) ( x - 3 ) = 0

x = - 7/3 ou 3