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 = 0
x^2-9 = 0
x+3 = 0
x-3 = 0
x-3 = 0
x-3 = 0 // + 3
x = 3
x^2-9 = 0
x^2-9 = 0
1*x^2 = 9 // : 1
x^2 = 9
x^2 = 9 // ^ 1/2
abs(x) = 3
x = 3 or x = -3
x+3 = 0
x+3 = 0
x+3 = 0 // - 3
x = -3
x in (-oo:-3) U (-3:3) U (3:+oo)
4/(x+3)-(6/(x-3)) = 10/(x^2-9) // - 10/(x^2-9)
4/(x+3)-(6/(x-3))-(10/(x^2-9)) = 0
4/(x+3)-6*(x-3)^-1-10*(x^2-9)^-1 = 0
4/(x+3)-6/(x-3)-10/(x^2-9) = 0
(4*(x-3)*(x^2-9))/((x+3)*(x-3)*(x^2-9))+(-6*(x+3)*(x^2-9))/((x+3)*(x-3)*(x^2-9))+(-10*(x+3)*(x-3))/((x+3)*(x-3)*(x^2-9)) = 0
4*(x-3)*(x^2-9)-6*(x+3)*(x^2-9)-10*(x+3)*(x-3) = 0
18*x-2*x^3-30*x^2-10*x^2+90+270 = 0
18*x-2*x^3-40*x^2+360 = 0
18*x-2*x^3-40*x^2+360 = 0
2*(9*x-x^3-20*x^2+180) = 0
9*x-x^3-20*x^2+180
x*(9-x^2)-20*x^2+180
20*(9-x^2)+x*(9-x^2)
(x+20)*(9-x^2)
2*(x+20)*(9-x^2) = 0
(2*(x+20)*(9-x^2))/((x+3)*(x-3)*(x^2-9)) = 0
(2*(x+20)*(9-x^2))/((x+3)*(x-3)*(x^2-9)) = 0 // * (x+3)*(x-3)*(x^2-9)
2*(x+20)*(9-x^2) = 0
( 9-x^2 )
-1*x^2 = -9 // : -1
x^2 = 9
x^2 = 9 // ^ 1/2
abs(x) = 3
x = 3 or x = -3
( x+20 )
x+20 = 0 // - 20
x = -20
x in { 3}
x in { -3}
x = -20
| 3.49X+14.75=46.16 | | 10x-(8+4x)=9x-17 | | 0.3v+2.4=1.5 | | x/4-3/4 | | w^2-w-6/2w^2-8 | | 7x^2-77= | | 4h(3h+2)=h+12 | | (10x-90)/3=10 | | 2x/3+6/3 | | 6(x+8)=7x-5 | | 10+v/6=4 | | -2-r-7=12 | | x^2+10x+6= | | 3/4x-1+1/2x=5/12x+1/6 | | -3/4j+2/5=7/10 | | 2+5=-18 | | 6x+6=-2+6x | | f(x)=-x^2+6x-5 | | 25x^2+6=70 | | 8x+3=2X+39 | | 8a-7=5a+11 | | 0=-16t^2+3t+1.3 | | 5y+14=360 | | -5x-13x=54 | | 63+k=84 | | 8-x+5=18 | | -5x-13g=54 | | (9a^2+6a)/(3a+2) | | (d+1)(8d+1)=18d | | -7x^2=336 | | 7a^2-30a=-8 | | 4x-x+3x=3x-(-10) |