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)
2*x-(1/x) = 0
2*x-x^-1 = 0
2*x^1-1*x^-1 = 0
(2*x^2-1*x^0)/(x^1) = 0 // * x^2
x^1*(2*x^2-1*x^0) = 0
x^1
2*x^2-1 = 0
2*x^2-1 = 0
DELTA = 0^2-(-1*2*4)
DELTA = 8
DELTA > 0
x = (8^(1/2)+0)/(2*2) or x = (0-8^(1/2))/(2*2)
x = (2^(1/2))/2 or x = (-2^(1/2))/2
x in { (-2^(1/2))/2, (2^(1/2))/2}
x in { (-2^(1/2))/2, (2^(1/2))/2 }
| x(.75)=81 | | 2+4z=14+4z | | 8x+5=8x-72 | | -10u+5=-9u | | 2x(x-3)=2x-5 | | -6s+6=-7s | | 3(2(4)+5)+2(3-4)=0 | | -1-6x=47 | | 37x+5=23-9 | | 10+4r=5r+2 | | -3a+17a+13a-16a-12a= | | 5x+4x=31 | | b*6/b*2 | | x-x/64=0 | | 11/3=-1/2g | | 2-67=-21 | | -10-8t=-10t | | 2x(x-3)=x-5 | | -126=-18 | | -4h-8=-6h | | 6qt=gal | | 4=64/w | | 6put=at | | x+78=20 | | 102+45+x=180 | | f(t)=-5t^2+15t+50 | | 40x-2=32x+5 | | 6k=10+4k | | 2m+14-8m=56 | | 3/x=100/125 | | 5a+7a-9a= | | 4/3*27 |