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)
(5*x^-1*x^4*x^4)/2 = 0
5/2*x^7 = 0 // : 5/2
x^7 = 0
x = 0
x in { 0}
x belongs to the empty set
| 5.5-3x+1=0 | | 3m^2-42m+120=0 | | 25x^2-100x=0 | | s*e*e=10e | | 1/4+2/5+3/7+4/10+5/14+6/19+7/25 | | s*e*e=20 | | -5(x^2)+5x+100=0 | | 7x+3=6x+y | | 7x+5=9x-7 | | 7x^3+21x^2+35x= | | 7x+3=6x+6 | | 3x^2-32x-192=0 | | (x-1)2=2(x-1)(x+3) | | 4(22*4)/1.5 | | 4(22x4)/1.5 | | c^2+5c+8c+40= | | 1.4=x-0.4 | | 2/x+2+2/x^2-4 | | -16x^2+80x=5 | | 6a+12a= | | 3y^2-11y=-12 | | 3y^12+11y=-6 | | (12x-6)/(14x-7) | | 3x(2x+9)=0 | | 6-4i=6i+17 | | 6-4i=6i+17 | | 7p-10=18 | | 7p-10=18 | | -24=4u+8(u-6) | | -16t^2+80t=5 | | (7g-d)(2g-4d)= | | 1/6+2/9 |