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 = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(3*((5*x^2)/36))/x = 0
5/12*x = 0 // : 5/12
x = 0
x in { 0}
x belongs to the empty set
| 0=-16t+25t+3 | | 7sin(x)-6=0 | | 3/5a-1/2a=q/2 | | 15-(12x+7)=14 | | (2x-7)/3=25 | | 15050=26-7p | | 12x+8-18=14 | | 2x-(7/3)=25 | | 4x+27=-1 | | -5x-2[2x-4(x+7)]-6= | | 16p+14q+p-4q-5p= | | Y^3-y^2-6y=0 | | -5-2[2x-4(x+7)]-6=0 | | 12m+5n-2m+10n= | | (3a-8x/2a)-(a-9x/6a)+3 | | x^2+4x+60=0 | | 12m+5n-2m+10m= | | 1.4-6.1(t+6)=4.6 | | 3x-31=44 | | 2/3k-1/14k=-3 | | 2/3x+6=18 | | 3(2x^2+xy-3y^2)= | | 5x+10=2x-49 | | 3x+0=152 | | 2x+(8/4)=3 | | 6x^2+8x= | | 5y^2-4y+2=0 | | (-1)=x^2-10x-3 | | (2x+2)(3x-11)=0 | | 6g-5-6-6g= | | (-10)-(29*y)=-18+91 | | .5(b+6)+9=24 |