当x=2,y=12时,求(x+y)(x-y)+(x-y)2-x(x-3y)的值. 发布时间:2017-05-16 15:42 │ 来源:www.tikuol.com 题型:解答题 问题: 当x=2,y=12时,求(x+y)(x-y)+(x-y)2-x(x-3y)的值.
题型:解答题 Nelson Mandela__________ peacefully at his Johannesburg home on Thursday,President Jacob Zuma said.A.diesB.diedC.has diedD.had died 查看答案