Bonsoir,
Résoudre les équations:
(4x-5)(4x+5)= 2(4x+5)
(4x-5)(4x+5)- 2(4x+5)= 0
(4x+5)(4x-5-2)= 0
(4x+5)(4x-7)= 0
4x+5= 0 ou 4x-7= 0
x= -5/4 x= 7/4
S= { -5/4 ; 7/4 }
(x-1)²= 0
x-1= 0
x= 1
S= { 1 }
x= 1 ou x= -3
S= { -3 ; 1 }
(2/x) - (x-1)/x= 1
(2-x+1)/x= 1
-x+3= x
-x-x= -3
-2x= -3
x= 3/2
S= { 3/2 }
-6x+3-3-1-x= -5x
-7x-1+5x= 0
-2x-1= 0
x= -1/2
S= { -1/2 }
6x²-6= 0
6(x²-1)= 0
x-1= 0
x= 1
S= { 1 }