a³-2a²+a分解因式

问题描述:

a³-2a²+a分解因式
还有一题4xy²-4x²y-y³

a³-2a²+a
=a(a²-2a+1)
=a(a-1)²
4xy²-4x²y-y³
=-y(4x²-4xy+y²)
=-y(2x-y)²