Question 635173
{{{(x^2-5x)(2x^2+x-3)=x^2*2x^2+x^2*x+x^2*(-3)-5x*2x^2-5x*x-5x*(-3)=2x^4+x^3-3x^2-10x^3-5x^2+15x=2x^4-9x^3-8x^2+15x}}}
Answer: a) {{{2x^4-9x^3-8x^2+15x}}}