If it's not what You are looking for type in the equation solver your own equation and let us solve it.
X3+3X^2-9X-1=0
We add all the numbers together, and all the variables
3X^2+X^3-9X-1=0
We do not support eXpression: X^3
| X3+3x^2-9x-1=0 | | X^3+3x^2-9x-1=0 | | 4y-3=6y-11 | | 320-4x-3x-2x=360 | | X³+3x²+9x=1 | | 3g=-2 | | M=-5,b=1 | | 7x=15-30^2 | | 3u+2+2-2u=1u+5 | | 2y^2=23 | | 9/25/x=3/7/15/14 | | 3(2x-5)=x-40 | | ÷5+3x4=28 | | 10y-8=5y-6 | | 16x^2-196x+369=9 | | 12/x=15/3 | | 10-3x=4(x-1) | | 7x*2-35=0 | | 45x2+10=x+20 | | ½x+2-3/2x=1,5-6 | | 5x+3(1-x)-2x=3x | | 3.3(y-9)-6=9 | | 3x+5(32-x)=114 | | t÷4-7=16 | | 14x-4-6x=6+x-2-x | | 2-3a=7-3a | | 0.027^(x-1)=11,1/9 | | y+5=y+5 | | 4r2+20+25=0 | | 0.027^(x-1)=111/9 | | 8(x+5=32 | | x+13=3x+11 |