Réponse :
Bonsoir;
Explications étape par étape
1) x= 2 ou x= -3/2
2) x = 0 ; x= 4
3) x = 6 ; x = -1/8
4) x = 2 ; x = -2
5) x = 8/7
6) x= [tex]\sqrt{3}[/tex]/[tex]\sqrt{2}[/tex] ; x = [tex]\sqrt{6}[/tex] / 3
26) 1) (x+3) ( x+3 -x+2) = 5(x+3) =0
x = -3
2) x(6x-1) = 0
x =0 ; x = 1/6
3) (3x-5)(3x+5) = 0
x = 5/3 ; x = -5/3
4 ) (x-2) (2x-1 -3x-2) = 0
(x-2) (-x -3) =0
x = 2 ; x = -3
5) (3x-2) (3x +2 -3 -x) = 0
(3x -2 ) ( 2x -1) =0
x = 2/3 ; x = 1/2
6) (x-3) ( 2x +1 - 5x -6 +x +3) = 0
(x-3) ( -2x -2) = 0
x = 3 ; x = -1
27)
1) (8x-1) ( x+4 +2x -3 ) =0
( 8x -1) ( 3x +1) = 0
x = 1/8 ; x = -1/3
2) 2x² -10x -4x +20 -20 = 0
2x² -14x = 0
2x ( x -7) = 0
x = 0 ; x = 7
3) ( 5x -2 ) ( 5x -2 +3(3x-2 ) =0
( 5x -2 ) ( 14x -8) =0
x = 2/5 ; x = 4/7
