-a+2a²-a^33ax²-3ay²16a²b-16a^3-4ab²x²(y²-1)+(1-y²)

分类: 作业答案 • 2021-12-18 16:27:44

问题描述：

-a+2a²-a^3
3ax²-3ay²
16a²b-16a^3-4ab²
x²(y²-1)+(1-y²)

答

-a+2a²-a^3=-a(a²-2a+1)=-a(a-1)²3ax²-3ay²=3a(x²-y²)=3a(x+y)(x-y)16a²b-16a^3-4ab²=-4a(4a²-4ab+b²)=-4a(2a+b)²x²(y²-1)+(1-y²)=(y&...