bonsoir
a ) ( 2 x - 7 ) ( 3 x + 1 + 6 - 4 x ) = 0
( 2 x - 7 ) ( - x + 7 ) = 0
x = 7/2 ou 7
b ) ( 4 x + 3 + 6 x - 1 ) ( 4 x + 3 - 6 x + 1 ) = 0
( 10 x + 2 ) ( - 2 x + 4 ) = 0
x = - 2/10 = - 1/5 ou 4/2 = 2
c) ( 3 x - 1 )² = 0
x = 1/3
