化简:(2x-y)的平方-4(x-y)(x+y)

2025-02-25 16:47:01
推荐回答(1个)
回答1:

(2x-y)的平方-4(x-y)(x+y)=4x^2-4xy+y^2-4x^2+4y^2
=5y^2-4xy

满意,采纳,不懂,追问