4xy-(x2-4y2)怎么因式分解

2025-06-26 19:24:17
推荐回答(1个)
回答1:

4xy-x^2+4y^2
=x^2+4xy+4y^2-2x^2
=(x+2y)^2-(√2x)^2
=(x+2y-√2x)(x+2y+√2x)
=[(1-√2)x+2y][(1+√2)x+2y]