化简:
(1)5x+y﹣x+2y;
(2)4(5a2﹣a)﹣(a﹣2a2)
(3)2(3x2﹣y2)﹣3(y2﹣2x2)
(4)﹣2(﹣3xy+2z)+5(﹣2xy﹣5z)+4z.
(1)5x+y﹣x+2y;
(2)4(5a2﹣a)﹣(a﹣2a2)
(3)2(3x2﹣y2)﹣3(y2﹣2x2)
(4)﹣2(﹣3xy+2z)+5(﹣2xy﹣5z)+4z.
更新时间:2021-11-21 01:36:43
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