Réponse :
Bjr,
(-5x + 10) (7x - 3) = 0
=> (-5x + 10) = 0 ; (7x -3) = 0 (produit nul)
=> -5x + 10 = 0 ; 7x - 3 = 0
=> -5x = -10 ; 7x = 3
=> 5x = 10 ; x = 3/7
=> x = 10/5 ; x = 3/7
x = 2 : x = 3/7
S = { 3/7 ; 2 }
En espérant avoir pu vous aider
