(1)x2-3x(2)-x2+14y2(3)(m+1)(m-1)-(1-m) ( 发布时间:2017-05-06 17:17 │ 来源:www.tikuol.com 题型:解答题 问题: (1)x2-3x(2)-x2+14y2(3)(m+1)(m-1)-(1-m) (4)xy2-9x(5)(2x+y)2-(x-y)2(6)1-x4.