x的四次方乘以y的四次方+4怎样分解因式

2025-02-27 15:53:50
推荐回答(1个)
回答1:

解:
x^4y^4+4
=x^4y^4+4x²y²+4-4x²y²
=(x²y²+2)²-(2xy)²
=(x²y²+2+2xy)(x²y²+2-2xy)