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^3 = 0
x^3 = 0
1*x^3 = 0 // : 1
x^3 = 0
x = 0
x in (-oo:0) U (0:+oo)
(30*((2*x^2)/5))/(x^3) = 0
12*x^-1 = 0 // : 12
x^-1 = 0
x należy do O
x belongs to the empty set
| 24+20t+4t^2= | | 4442+250+x=1.28x | | 4442+250+x=1.27x | | 1250+250+x=1.47x | | 42.92=4a | | 42.92=4*10.73+-0.5b+2b | | 42.92=4a+2b | | 4(x+5)=5x+18 | | 1003+250+x=1.08x | | 8x-8=x+10 | | lgx+2=0.4 | | 1003+250+x=1.09x | | 360+250+x=1.95x | | x-10+3x+2x-20=180 | | (2x-24z)-15(10x)x= | | 5xX+2=39 | | 5xX=39 | | 3260+250+x=1.3x | | 560+250+x=1.3x | | y=-2x^3+20x^2-24x-144 | | 560+250+x=1.5x | | 20q=-10q | | 560+250+x=1.45x | | 0.8x^2-3.2x+6.2=0 | | (3+i)-(x+2yi)=0 | | 1909+250+x=1.65x | | 420+250+x=1.45x | | 420+250+x=1.47x | | 6k+5=3k+14 | | 15x+2=37 | | 420+250+x=1.42x | | 12+3x=7x-24 |