Question 970015
{{{(a-x)(b-x)(c-x)=(ab-ax-bx+x^2)(c-x)}}}

{{{(a-x)(b-x)(c-x)=-x^3+ax^2+bx^2+cx^2 -abx-acx-bcx +abc}}}

{{{(a-x)(b-x)(c-x)=-x^3+(a+b+c)x^2 -(ab+ac+bc)x +abc}}}