If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x4+8x^3+15x^2=0
We do not support expression: x^3
| 5-x=3x+6 | | -4c-3=9-c | | -18-4x+5x=8 | | 3∙(2x+7)=8∙(x+2) | | 16-2t=2/3t+9 | | 13/2x=52 | | -13x-4=2-2(x+4) | | +4x+4=+3x+12 | | (1/x)+(1/x+1)=1/6 | | 10x+1=10x+x | | -63/10=21/10b | | 4x^2-33x+7=0 | | (x.x.2)+10x+12=2(x+2)(x+3) | | -8x²+14x-3=0 | | -5m^2=-45 | | 8/5p=40 | | 7v^2-8=55v | | P^2+16p-93=-10 | | x+7+x=180 | | 9π=πx | | 84n^2=24-44n | | 2x-(-2x+7)=5 | | 5n^2-32n=64 | | x=2(14÷7-2) | | 10=a/7 | | 21x^2-20=-13x | | 3x+6=x+2x+6 | | 24x^2=-64+80x | | 7x^2+77x=-210 | | 6r^2+210=-72r | | m^2=-2m+48 | | 2*2r=11 |