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)
1/2 = 3*x-(4/x) // - 3*x-(4/x)
4/x-(3*x)+1/2 = 0
4/x-3*x+1/2 = 0
4*x^-1-3*x^1+1/2*x^0 = 0
(1/2*x^1-3*x^2+4*x^0)/(x^1) = 0 // * x^2
x^1*(1/2*x^1-3*x^2+4*x^0) = 0
x^1
(1/2)*x-3*x^2+4 = 0
(1/2)*x-3*x^2+4 = 0
DELTA = (1/2)^2-(-3*4*4)
DELTA = 193/4
DELTA > 0
x = ((193/4)^(1/2)-(1/2))/(-3*2) or x = (-(1/2)-(193/4)^(1/2))/(-3*2)
x = ((193/4)^(1/2)-1/2)/(-6) or x = ((193/4)^(1/2)+1/2)/6
x in { ((193/4)^(1/2)-1/2)/(-6), ((193/4)^(1/2)+1/2)/6}
x in { ((193/4)^(1/2)-1/2)/(-6), ((193/4)^(1/2)+1/2)/6 }
| .0089=x/408 | | 4m^2+5m-14= | | 6r^2+6r=3 | | .89=x/408 | | 5b+b^2=0 | | ln(x-7)=4 | | (-4-5i)-1(4+6i)= | | 4msquared+5m-14= | | 131794.27/x=.9913 | | A+12=27 | | (x^2y^3+4xy^2-3y)(-y^2)= | | 125=y^-3/2 | | 7x+30=-9 | | m(m-20)=-96 | | x^2+3x-5=17 | | x^3-4x^2+x=0 | | 4u-2=10 | | (2a+b)(6a-5)= | | 2r^2+2=-16 | | 3.75+0.54(X-1)=16.71 | | abs(4u-2)=10 | | 4s+3t=v | | (x-3)2+(y+2)2= | | (n+15)*(n+15)=576 | | 2b+7c=9 | | (N+15)x(n+15)=576 | | l+15.2=4.5 | | 6*(0+2)= | | (i-3)2=8-6i | | 2*(3+2)= | | x-3/5=34 | | 2(x-6)=30-4x |