x的四次方+2x²y²+y的四次方-4x²y²【因式分解】

问题描述:

x的四次方+2x²y²+y的四次方-4x²y²【因式分解】


x^4++2x²y²+y^4-4x²y²
=(x²+y²)²-(2xy)²
=[(x²+y²)-2xy][(x²+y²)+2xy]
=(x-y)²(x+y)²