(2360问答x+y-1)的平方
=(2x+y-1)(2x+y-1)
=4x²+y²+1+4xy-4x-2y
(2x+y-1)的平方怎么算
jacky
2023-11-15 20:09
阅读 527
jacky
2023-11-15 20:09
阅读 527
