题目有两个关键点：第一、识别多项式每一项的系数与指数；第二、对结果能很好的合并同类项。

There are two key questions: First, identify the polynomial coefficients and each of the index Second, the results can be a good merger of similar items.

youdao

题目有两个关键点：第一、识别多项式每一项的系数与指数；第二、对结果能很好的合并同类项。

There are two key questions: First, identify the polynomial coefficients and each of the index Second, the results can be a good merger of similar items.

youdao