计算:15-(1-x+x²)+(1-x+x²-x³)用整体思想
问题描述:
计算:15-(1-x+x²)+(1-x+x²-x³)用整体思想
答
15-(1-x+x²)+(1-x+x²-x³)
=15-(1-x+x²)+(1-x+x²)-x³
=15--x³