If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x(x^2-x-21)+45=0
We multiply parentheses
x^3-1x^2-21x+45=0
We do not support expression: x^3
| 5x/20+20=30x+100 | | -z/4=5 | | 5x/20=30x+100 | | X^3+3x^2-21x+45=0 | | 3n+26=7n-5 | | 8(x+2)-2=5x+3(4+x) | | 6×c=96 | | -4(7x-8)+4=-28x+36 | | 2x2−24x+54=0 | | 2x^2−24x+54=0 | | -3a+7=-17 | | 31-v=200 | | x^2+2.32*10^-11x-4.408*10^-12=0 | | 6g+9.2=24= | | 3×y=18 | | 2y(y^2-162y)+432=0 | | 3x+6=15x-9 | | 125-x=242 | | f(X)=400-10X | | 2x+13/32=5/8-1/16x-1/4 | | 16(8x)−2=6 | | 3(x-1)/4=3(x+8)/13 | | 6(y-3)-4=-2(-9y+9)-6y | | 0.9(x+90)+0.1(x-80)=163 | | 3y+1=2y-5 | | -t^2+-8t+15=0 | | 9(2n+5)=7(6n+1)+1 | | 2d+8=16 | | 8(4x+5)-5(6x)-x=53-6(x+1)+3(2x+2) | | -3(4t-2)+9t=5t-9 | | 7x+6=-6+4x+21 | | 9x-3+2(x-5)=4x-3 |