If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
3*x^2+1 = 0
3*x^2+1 = 0
3*x^2+1 = 0
3*x^2 = -1 // : 3
x^2 = -1/3
x in (-oo:+oo)
(6*x^4+6*x^3-x^2)/(3*x^2+1) = 0
6*x^4+6*x^3-x^2 = 0
x^2*(6*x^2+6*x-1) = 0
6*x^2+6*x-1 = 0
DELTA = 6^2-(-1*4*6)
DELTA = 60
DELTA > 0
x = (60^(1/2)-6)/(2*6) or x = (-60^(1/2)-6)/(2*6)
x = (2*15^(1/2)-6)/12 or x = (-2*15^(1/2)-6)/12
x^2*(x-((-2*15^(1/2)-6)/12))*(x-((2*15^(1/2)-6)/12)) = 0
(x^2*(x-((-2*15^(1/2)-6)/12))*(x-((2*15^(1/2)-6)/12)))/(3*x^2+1) = 0
( x-((-2*15^(1/2)-6)/12) )
x-((-2*15^(1/2)-6)/12) = 0 // + (-2*15^(1/2)-6)/12
x = (-2*15^(1/2)-6)/12
( x-((2*15^(1/2)-6)/12) )
x-((2*15^(1/2)-6)/12) = 0 // + (2*15^(1/2)-6)/12
x = (2*15^(1/2)-6)/12
( x^2 )
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in { (-2*15^(1/2)-6)/12, (2*15^(1/2)-6)/12, 0 }
| rx+sx-t=1 | | Y=1/20X | | (-8y^(3/4)/y^3z^6)^(-1/3) | | N+(n+2)=66 | | -3x-y=-6 | | (2x+20)-(x-14)=90 | | 17-(4x-2)=2(x+3) | | x-20+75+50=180 | | 1/2(2k-4)=3(k+2)-2k | | 4x^3-6x^2-5x+2=0 | | 75=-20+19g | | 2x^2-42x+245=0 | | 6b-8=4b | | 9x+2y=17fory | | 3/10x=-1 | | y/8-3=6 | | 90+x+5+2x-23=180 | | 28=x/9+7 | | -4m-24+2m=3m+6 | | 180=3x+60(x+20) | | 3S-5=4 | | 21=x/3+8 | | -11+k/4=-17 | | 3q^2-18q+15=0 | | 8y-5=-2y+75 | | (3/3+2/3)j=15 | | -5+7x=-33 | | k-20=9k-4 | | 2(8a-7)(a-5)=0 | | 2(8a-7)(1-5)=0 | | 3.7+10=8.49 | | -10b-29=-18b+91 |