If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
(x+3)*(x-3) = 0
3-x = 0
x+3 = 0
(x+3)*(x-3) = 0
(x+3)*(x-3) = 0
( x+3 )
x+3 = 0 // - 3
x = -3
( x-3 )
x-3 = 0 // + 3
x = 3
3-x = 0
3-x = 0
3-x = 0 // - 3
-x = -3 // * -1
x = 3
x+3 = 0
x+3 = 0
x+3 = 0 // - 3
x = -3
x in (-oo:-3) U (-3:3) U (3:+oo)
2/(x+3)+5/(3-x) = 6/((x+3)*(x-3)) // - 6/((x+3)*(x-3))
2/(x+3)+5/(3-x)-(6/((x+3)*(x-3))) = 0
2/(x+3)+5/(3-x)-6*(x-3)^-1*(x+3)^-1 = 0
2/(x+3)+5/(3-x)-6/((x-3)*(x+3)) = 0
(2*(3-x)*(x-3))/((x+3)*(3-x)*(x-3))+(5*(x+3)*(x-3))/((x+3)*(3-x)*(x-3))+(-6*(3-x))/((x+3)*(3-x)*(x-3)) = 0
2*(3-x)*(x-3)+5*(x+3)*(x-3)-6*(3-x) = 0
3*x^2+12*x+6*x-63-18 = 0
3*x^2+18*x-81 = 0
3*x^2+18*x-81 = 0
3*(x^2+6*x-27) = 0
x^2+6*x-27 = 0
DELTA = 6^2-(-27*1*4)
DELTA = 144
DELTA > 0
x = (144^(1/2)-6)/(1*2) or x = (-144^(1/2)-6)/(1*2)
x = 3 or x = -9
3*(x+9)*(x-3) = 0
(3*(x+9)*(x-3))/((x+3)*(3-x)*(x-3)) = 0
(3*(x+9)*(x-3))/((x+3)*(3-x)*(x-3)) = 0 // * (x+3)*(3-x)*(x-3)
3*(x+9)*(x-3) = 0
( x+9 )
x+9 = 0 // - 9
x = -9
( x-3 )
x-3 = 0 // + 3
x = 3
x in { 3}
x = -9
| 2/(x+3)+5/(3-x)=6/(x+3)(x-3) | | 5z-7=14z+12 | | 2y^2-9y-11= | | e^12x+8=20 | | x^4=228 | | n^4=228 | | 7x/x=7 | | n^4+12=240 | | 2n^2-11n+12= | | 7x+7=5x+15 | | X^2=722 | | 20-z/3=x/2 | | 5t^2+8t+3= | | 3d^2+22d+7= | | (X^2-x+6)/(x^3+3x^2) | | (x)/(x-3)+5=(3)/(x-3) | | 2w^2+13w+11= | | 25=(x/1000) | | 5.1x-9.4=.22 | | y=-2/3x+14 | | 2h^2+5h+2= | | y=-2/3+14 | | 28x^2-6x+21=0 | | 6v^2+13v+2= | | 3(x-4)=2(x+3)+5x | | 2i= | | Y=3X^2+36x+13 | | 5+2k=k-2+k | | 2y^2+9y+9= | | (4v-6)(9-v)=0 | | 5m^2+12m+4= | | 5(2x-8)+24=3(4+2x) |