If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
5*x = 0
5*x = 0
5*x = 0
5*x = 0 // : 5
x = 0
x in (-oo:0) U (0:+oo)
(25*x^3+15*x^2-(30*x))/(5*x) = 0
(25*x^3+15*x^2-30*x)/(5*x) = 0
25*x^3+15*x^2-30*x = 0
5*x*(5*x^2+3*x-6) = 0
5*x^2+3*x-6 = 0
DELTA = 3^2-(-6*4*5)
DELTA = 129
DELTA > 0
x = (129^(1/2)-3)/(2*5) or x = (-129^(1/2)-3)/(2*5)
x = (129^(1/2)-3)/10 or x = (-(129^(1/2)+3))/10
5*x*(x+(129^(1/2)+3)/10)*(x-((129^(1/2)-3)/10)) = 0
(x+(129^(1/2)+3)/10)*(x-((129^(1/2)-3)/10)) = 0
( x+(129^(1/2)+3)/10 )
x+(129^(1/2)+3)/10 = 0 // - (129^(1/2)+3)/10
x = -((129^(1/2)+3)/10)
( x-((129^(1/2)-3)/10) )
x-((129^(1/2)-3)/10) = 0 // + (129^(1/2)-3)/10
x = (129^(1/2)-3)/10
x in { -((129^(1/2)+3)/10), (129^(1/2)-3)/10 }
| X^2-8x=8 | | 2x+3y+5z=128 | | 61-7x=29x+17 | | 3x*(-6)=18 | | 5y-6=2y+6 | | 10=3a+13 | | 4+2(3n+1)=3(n+3) | | x(4x-15)=25 | | 5x-55=2x-10 | | 10-0.5x=20 | | 3(3b+6)=5(b+2) | | 9y-13y=-19-25 | | x^2-3=x^2-25 | | -3(6+3x)+2(x+2)=3x+2-2x | | 3(2p-4)=2(4p-1) | | (x-3/x-5) | | 32^2/5 | | 6(1+4v)+2(v+2)=-42 | | v=5p(2t)(4w) | | 0=-1.25+.15x | | 5x+4=2x-25 | | -4(3-6m)-(1-5n)=16 | | (5x+4)(2x^2-17x-9)=0 | | x+32-21=45.7 | | -4(4k-3)+6(1-6k)=-34 | | 4s+20=16 | | 0=1.25+0.15x | | -6(3r+3)-4(4r+3)=-30 | | (14-3/14-5)=(14+5/14+1) | | 4n+21p+7= | | -5r+7=-2(2r-1) | | (-14-3/-14-5)=(-14+5/-14+1) |