If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
0.5-x = 0
0.5-x = 0
0.5-x = 0
0.5-x = 0 // - 0.5
-x = -0.5 // * -1
x = 0.5
x in (-oo:0.5) U (0.5:+oo)
0.000018 = (x^2)/(0.5-x) // - (x^2)/(0.5-x)
0.000018-((x^2)/(0.5-x)) = 0
(-1*x^2)/(0.5-x)+0.000018 = 0
(-1*x^2)/(0.5-x)+(0.000018*(0.5-x))/(0.5-x) = 0
0.000018*(0.5-x)-1*x^2 = 0
0.000009-x^2-0.000018*x = 0
0.000009-x^2-0.000018*x = 0
0.000009-x^2-0.000018*x = 0
DELTA = (-0.000018)^2-(-1*0.000009*4)
DELTA = 0.000036
DELTA > 0
x = (0.000036^(1/2)+0.000018)/(-1*2) or x = (0.000018-0.000036^(1/2))/(-1*2)
x = (0.000036^(1/2)+0.000018)/(-2) or x = (0.000018-0.000036^(1/2))/(-2)
(x-((0.000036^(1/2)+0.000018)/(-2)))*(x-((0.000018-0.000036^(1/2))/(-2))) = 0
((x-((0.000036^(1/2)+0.000018)/(-2)))*(x-((0.000018-0.000036^(1/2))/(-2))))/(0.5-x) = 0
((x-((0.000036^(1/2)+0.000018)/(-2)))*(x-((0.000018-0.000036^(1/2))/(-2))))/(0.5-x) = 0 // * 0.5-x
(x-((0.000036^(1/2)+0.000018)/(-2)))*(x-((0.000018-0.000036^(1/2))/(-2))) = 0
( x-((0.000018-0.000036^(1/2))/(-2)) )
x-((0.000018-0.000036^(1/2))/(-2)) = 0 // + (0.000018-0.000036^(1/2))/(-2)
x = (0.000018-0.000036^(1/2))/(-2)
( x-((0.000036^(1/2)+0.000018)/(-2)) )
x-((0.000036^(1/2)+0.000018)/(-2)) = 0 // + (0.000036^(1/2)+0.000018)/(-2)
x = (0.000036^(1/2)+0.000018)/(-2)
x in { (0.000018-0.000036^(1/2))/(-2), (0.000036^(1/2)+0.000018)/(-2) }
| 2/3+13y+1/4 | | x^2-2x-33=0 | | (m-n+k)(m+9n-6k)=0 | | 5(7)+y=30 | | 5(x-8)+10=3(x-6) | | 6x(5x-7)=0 | | 5(8)+y=30 | | 7a+4-9a=6 | | v^2+12v-45=0 | | 7x+19=8x+12 | | 16-y=2x | | 3x^3+x^2+36x+12=0 | | 5(10)+y=30 | | -2+3(1)+2=0 | | 3(x+6)+7=7x-4(x-4) | | 1/5-3/1 | | 24/5*n=6/5 | | 7+1=y | | 1/5-3 | | 3x+35=27 | | a^2+6a-27=0 | | 11/3*n=2/9 | | 5+3(4x-4)=6-4(2x+1) | | 7+10=y | | 6((-7+-1v)(4+-1v))= | | (r-2)(r+6)=11 | | 7+12=y | | 2/3=8*x | | 6((-7+-1v)(4+-1v))=0 | | 4(3y+6)-12=0 | | 0.6-0.16y=3.4 | | 7+13=y |