将[(p-q)³-2(q-p)²-2/3(q-p)]/p-q/3(p≠q)化归为关于p、q的多项式

Question

将[(p-q)³-2(q-p)²-2/3(q-p)]/ p-q/3(p≠q)化归为关于p、q的多项式

Answer 1

[(p-q)³-2(q-p)²-2/3(q-p)]/[( p-q)/3]
=3(p-q)²-6(p-q)+2( p-q)