If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x3+x2-21x-45=0
We add all the numbers together, and all the variables
x^3+x^2-21x-45=0
We do not support expression: x^3
| 2p+15=p+15 | | -46+2=6-4x-4x | | 5x÷19=6x+2 | | k^2−18k+81=0 | | -32-5x=-1-4(1+8x) | | k^2−18k+81=0 | | 30x^2-105x-1=0 | | 2/5p-3=p+3/5 | | 3x-3+5x+9=332 | | 11p+2=38-p | | -2a-10=-30 | | -3x+11=66+2x | | 27x-39=25x+53 | | -531=-23x-163 | | 2-3/8x=40 | | -5x+7=10-2x | | 37=-x-21 | | 181+3x=15x-239 | | 2-3/8*13=x | | -19=-13x-30/12 | | -2p-8p=-8-1-p+7 | | 8x-(3x-4)=2 | | -1089=9(-8x-9) | | 85-(4x-6)=x{1 | | 4x+10=-36 | | -2x-5(-4x-23)=331 | | 7x+4x*x=8x-8x*x | | -6x+5(-6x+41)=-227 | | 3(2x+4)-8x=-2(x+1) | | 7y=10y-9 | | -7x-195=-447 | | 6x+12-8x=-2x+1 |