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-4)*(160/x-4) = 144 // - 144
2*(x-4)*(160/x-4)-144 = 0
2*(x-4)*(160*x^-1-4)-144 = 0
2*(x-4)*(160*x^-1-4)-144 = 0
208-8*x-1280*x^-1 = 0
208-8*x-1280*x^-1 = 0
8*(26-x-160*x^-1) = 0
26*x^0-1*x^1-160*x^-1 = 0
(26*x^1-1*x^2-160*x^0)/(x^1) = 0 // * x^2
x^1*(26*x^1-1*x^2-160*x^0) = 0
x^1
26*x-x^2-160 = 0
26*x-x^2-160 = 0
DELTA = 26^2-(-160*(-1)*4)
DELTA = 36
DELTA > 0
x = (36^(1/2)-26)/(-1*2) or x = (-36^(1/2)-26)/(-1*2)
x = 10 or x = 16
x in { 10, 16}
8*(x-10)*(x-16) = 0
8*(x-10)*(x-16) = 0
( 8 )
8 = 0
x belongs to the empty set
( x-10 )
x-10 = 0 // + 10
x = 10
( x-16 )
x-16 = 0 // + 16
x = 16
x in { 10, 16 }
| y=-2x^4+3x^2 | | x/-12=-156? | | 7r^3-175r=0 | | 2(4a-5)+5=35 | | -3(4x+2)=24x-18 | | 4x+3(x-2)=20 | | 17-3k=17-2k | | 4.5+4x= | | x^2-22x-20=0 | | 50=(1+3w)w | | p(3)=12 | | -7(-8x-9+2n)= | | 2m+4m-2=m+13 | | -21=-4(-5y+1)+5(9+2y)+y | | -165=4p-5(2+7p) | | 50=4w+2 | | p(30)=12 | | X/4=96 | | f(x)=(1/2)x^2-x-9 | | =3[5-2(4x-9)]-17 | | -27+w=73 | | 4x+5y=8x-3y | | x+x+y+y=1280 | | -2+10b=10b-2 | | 6.8(x-1)=-0.2x+35.2 | | 8.50=4w+2 | | -8j+14=-8(j-7) | | 27n+18n=0 | | 6v-2=-8+3v | | f(x)=2x/2 | | -8j+144= | | 24x-52=4(1+6x) |