If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
-8*x^2 = 0
-8*x^2 = 0
-8*x^2 = 0
-8*x^2 = 0 // : -8
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
(48*x^6-(32*x^4)-(40*x^2))/(-8*x^2) = 0
(48*x^6-32*x^4-40*x^2)/(-8*x^2) = 0
(48*x^6-(32*x^4)-(40*x^2))/(-8*x^2) = 0 // * -8*x^2
48*x^6-(32*x^4)-(40*x^2) = 0
48*x^6-32*x^4-40*x^2 = 0
t_1 = x^2
48*t_1^3-32*t_1^2-40*t_1^1 = 0
48*t_1^3-32*t_1^2-40*t_1 = 0
8*t_1*(6*t_1^2-4*t_1-5) = 0
6*t_1^2-4*t_1-5 = 0
DELTA = (-4)^2-(-5*4*6)
DELTA = 136
DELTA > 0
t_1 = (136^(1/2)+4)/(2*6) or t_1 = (4-136^(1/2))/(2*6)
t_1 = (2*34^(1/2)+4)/12 or t_1 = (4-2*34^(1/2))/12
8*t_1 = 0
8*t_1 = 0 // : 8
t_1 = 0
t_1 = (4-2*34^(1/2))/12
x^2-((4-2*34^(1/2))/12) = 0
1*x^2 = (4-2*34^(1/2))/12 // : 1
x^2 = (4-2*34^(1/2))/12
t_1 = (2*34^(1/2)+4)/12
x^2-((2*34^(1/2)+4)/12) = 0
1*x^2 = (2*34^(1/2)+4)/12 // : 1
x^2 = (2*34^(1/2)+4)/12
x^2 = (2*34^(1/2)+4)/12 // ^ 1/2
abs(x) = ((2*34^(1/2)+4)^(1/2))/(2*3^(1/2))
x = ((2*34^(1/2)+4)^(1/2))/(2*3^(1/2)) or x = -(((2*34^(1/2)+4)^(1/2))/(2*3^(1/2)))
t_1 = 0
x^2+0 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in { 0}
x in { ((2*34^(1/2)+4)^(1/2))/(2*3^(1/2)), -(((2*34^(1/2)+4)^(1/2))/(2*3^(1/2))) }
| x^3-12x^2+12x-24=0 | | m-4.2=2.1m-0.9 | | 10x-7+2x-4=9x-3+2x | | 8/9x=-16 | | 2x+3=7x+8 | | x/3+x/8=11/24 | | logx-log(x+3)=-1 | | y=3x^3-27x^2+24x | | x-7=3(2x+1) | | 6/52x6/51 | | 2x+6=6x-1 | | y=3x^3-27x^2+24 | | 24/2=x/5 | | (X^2)+81=0 | | 5/7x-4/3=(3x+1)/2 | | 4(x-7)=11 | | 6/5x+2x=17 | | -3y-3y=-15 | | (4x+3)(4x+3)=225 | | n/4-8=-5 | | -3.5x=58.10 | | 35=n-(-16) | | 2y(x+4)=144y | | -(5x+3)-4=8+6x | | 8h+4=2h-20 | | jh=5 | | 4r^2=9/16 | | 0.70x+0.45(30)=56.9 | | (35x^3-6x)/7x | | 1/2x+5=3x-4 | | 16c^2+24c+9=0 | | 18/-6= |