If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
8*x-((2/5)*((x^11)/5-(8*x))) = 0
(-2/5)*((x^11)/5-8*x)+8*x = 0
8*x-2/5*(1/5*x^11-8*x) = 0
8*x-2/5*(1/5*x^11-8*x) = 0
56/5*x-2/25*x^11 = 0
56/5*x-2/25*x^11 = 0
2/5*x*(28-1/5*x^10) = 0
-1/5*x^10 = -28 // : -1/5
x^10 = 140
x^10 = 140 // ^ 1/10
abs(x) = 140^(1/10)
x = 140^(1/10) or x = -140^(1/10)
2/5*x*(x-140^(1/10))*(x+140^(1/10)) = 0
2/5*x*(x-140^(1/10))*(x+140^(1/10)) = 0
( 2/5*x )
2/5*x = 0 // : 2/5
x = 0
( x+140^(1/10) )
x+140^(1/10) = 0 // - 140^(1/10)
x = -140^(1/10)
( x-140^(1/10) )
x-140^(1/10) = 0 // + 140^(1/10)
x = 140^(1/10)
x in { 0, -140^(1/10), 140^(1/10) }
| 2(x-3/x+1)^2+(x-3/x+1)-1=0 | | R^2-7r-18=0 | | 2kx+9=4x+kx^2 | | 4m^3-64m^2-900m=0 | | 20r^2+17r-63=0 | | y=3x^2+17x-20 | | 6.4+-4.1c-0.9-4.7c=36-3 | | 276/115 | | 5y+y-6-6y+8y-10=23+9 | | 36w^2-25t^2=0 | | -d+4d+4+7d-12=72 | | 10k^2-19+6= | | 5.62-2.9m+7.1m=52.24 | | 2y^2-11y+12= | | 2b^2+9b+7= | | 3d^2+5d+2= | | 20q^2-13qs-15s^2=0 | | 3a-5-2a=2a-e | | 8f^2+14f+3= | | 4e^2+15e+9= | | s=0.5at^2 | | 2w^2+31w+15= | | 2m^2+11m+5= | | [4(p+2q)-5r][4(p+2q)+5r]= | | [9-(m+3n)][9+(m+3n)]= | | (2-1)(2+1)= | | [(j+k)+20][(j+k)-20]= | | 4s+10=2s | | 6p^2+19p+10= | | 5k^2+17k+6= | | 4d^2+13d+3= | | 1/2t^2+3t-8 |