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)
x/2-(2/x) = 0
x/2-2*x^-1 = 0
1/2*x^1-2*x^-1 = 0
(1/2*x^2-2*x^0)/(x^1) = 0 // * x^2
x^1*(1/2*x^2-2*x^0) = 0
x^1
(1/2)*x^2-2 = 0
(1/2)*x^2-2 = 0
DELTA = 0^2-(-2*4*(1/2))
DELTA = 4
DELTA > 0
x = (4^(1/2)+0)/(2*(1/2)) or x = (0-4^(1/2))/(2*(1/2))
x = 2 or x = -2
x in { -2, 2}
x in { -2, 2 }
| 8/9=5/k | | 4x/2=16-8m/4 | | 3(8*-1.5)=30 | | 1/2(2x-6)=x/3 | | 9x-8=5x-108 | | (2/5)n+(1/10)=(1/2)(n+4) | | 18a+4=-9 | | 1/2(2x-6)x/3 | | -5x+28=-12 | | 15x-5y=15 | | 4b-84=6(171-b) | | -8(x+3)+149=13+16 | | 11(8x-3)=30 | | 7x-(2x+20)=20 | | 3.4-4.89=5y+4.71 | | -27=9.5(6.5x-3.5) | | A+a+1.4+a11/2 | | 3*x^2+x-10=0 | | 9=x/-9 | | -2(63-a)=3(a-88)+29 | | 11-2x=-15 | | 4(2x+10)=30 | | 9-4x=y | | 3x+12=200 | | 12-3(4x-4)=-6 | | 13x+29=12x+18 | | (4x+1)(x-2)= | | 2/4x+7=4/5x | | z=4-2x | | 3-11xn=9+5n | | x^2-3*x-10=0 | | 8u-3+8u+14=-2u-4 |