题目内容
化简:(每题4分)
(1) 4x-(x-3y); (2) (5a2+2b2)-3(a2-4b2).
(1) 3x+3y (2)
解析:略
化简:(每题4分)(1) 4x-(x-3y); (2) (5a2+2b2)-3(a2-4b2).