Question 1158334
{{{x^4-2x^3-15x^2=x^2(x^2-2x-15)=x^2(x-5)(x+3)}}} The roots are 0, 5, and -3. The root 0 has a multiplicity of 2. The others two roots have a multiplicity of 1. Here is a rough sketch, {{{graph(550,550,-15,15,-15,15,y=x^4-2x^3-15x^2)}}}.