Bonjour,
Résoudre les équations:
(x²-9)/(x+3)= 0
x+3≠ 0 => x≠ -3
x²-9= 0
x²= 9
x= -√9 ou x= √9
x= -3 x= 3
S= { 3 ]
. valeurs interdites: x≠ 3 et x≠2. D=R\ { 2 ; 3 ]
1 - (x+3)/(x-3) - 2/(-x+2)= 0
[ 1 (x-3)(-x+2)/(x-3)(-x+2) ]- [ (x+3)(-x+2)/ ((x-3)(-x+2) ] - [ 2(x-3)/ (x-3)(-x+2) ]= 0
[ (x-3)(-x+2) - (x+3)(-x+2) - 2(x-3) ] / (x-3)(-x+2) ] = 0
( -x²+3x+2x-6- (-x²-3x+2x+6)-2x+6)/ (x-3)(-x+2)= 0
(-x²+5x-6+x²+x-6-2x+6)/ (x-3)(-x+2)= 0
(4x - 6) / (x-3)(-x+2) = 0
4x-6= 0
x= 6/4
x= 3/2
tu complètes la solution, attention aux valeurs interdites..... vérifie les calculs.
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Bonjour,
Résoudre les équations:
(x²-9)/(x+3)= 0
x+3≠ 0 => x≠ -3
x²-9= 0
x²= 9
x= -√9 ou x= √9
x= -3 x= 3
S= { 3 ]
. valeurs interdites: x≠ 3 et x≠2. D=R\ { 2 ; 3 ]
1 - (x+3)/(x-3) - 2/(-x+2)= 0
[ 1 (x-3)(-x+2)/(x-3)(-x+2) ]- [ (x+3)(-x+2)/ ((x-3)(-x+2) ] - [ 2(x-3)/ (x-3)(-x+2) ]= 0
[ (x-3)(-x+2) - (x+3)(-x+2) - 2(x-3) ] / (x-3)(-x+2) ] = 0
( -x²+3x+2x-6- (-x²-3x+2x+6)-2x+6)/ (x-3)(-x+2)= 0
(-x²+5x-6+x²+x-6-2x+6)/ (x-3)(-x+2)= 0
(4x - 6) / (x-3)(-x+2) = 0
4x-6= 0
x= 6/4
x= 3/2
tu complètes la solution, attention aux valeurs interdites..... vérifie les calculs.