If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( v )
v-4 = 0
v-4 = 0
v-4 = 0
v-4 = 0 // + 4
v = 4
v in (-oo:4) U (4:+oo)
(v^4-(4*v^3)+2*v-8)/(v-4) = 0
(v^4-4*v^3+2*v-8)/(v-4) = 0
v^4-4*v^3+2*v-8 = 0
v^4-4*v^3+2*v-8
v^3*(v-4)+2*v-8
2*(v-4)+v^3*(v-4)
(v^3+2)*(v-4)
v^3+2 = 0
1*v^3 = -2 // : 1
v^3 = -2
v^3 = -2 // ^ 1/3
v = -2^(1/3)
v = -2^(1/3)
| 0.3x+0.4(20)=0.2(x+40) | | 0.16(y-8)+0.04y=0.10y-2 | | 23j=-10 | | (2x)/5-x/3=4 | | 3+4x=-4+5x | | x+2y+3z=11 | | x+x-2/x-16 | | 5-(2x-7)=14 | | [3+x]=12 | | .1x=(x+2) | | 9x-5=30x+2 | | 3x-6=6x(x-3) | | 1/4*3-1/3=5/12 | | 2(-1)=x | | x-3/4=1/2 | | x/x-2+x+2/x=2 | | (2x)/5-(x/3)=4 | | ax+ay=x^2-Y^2 | | 2x=112 | | 63=x+49 | | -3(x-11)=4x-1 | | (5+u)(3u+1)=0 | | 8=4/11a | | (21x^4-28x^3)/(7X) | | 7.8=x-11 | | 2x+4i=0 | | 3ac+2=b | | (5x/3)(2x/10)(2a/9) | | ((2x)/5)-(x/3)=4 | | 21x^4-28x^3/7x | | 5*10.5+1=x | | Y=8/7x-91/7 |