合并多项式中的同类项：2m²+1-3m-7-3m²+5
人气：373 ℃ 时间：2019-10-09 02:34:44
解答
2m²+1-3m-7-3m²+5
=(2m²-3m²)-3m+(1-7+5)
=-m²-3m-1
推荐
猜你喜欢
- 教室里有一面墙壁长6米,宽3米,墙上有2扇窗户,每扇窗户的面积是3平方米,现在要粉刷这面墙壁,
- 已知向量a=(cos3/2x,sin3/2x),b=(cosx/2,-sinx/2),其中x属于[0,π/2]
- is it true most people don't know all the chinese letters?
- 在一支容积为30mL的试管内充满NO2和O2的混合气体,把试管倒置于水中,充分反应后余5mL,
- 书法家王羲之阅读
- watch的现在分词是什么?
- ____most students,she was always well prepared and never came to class late A) like B)as
- The life people were used to______since the earthquake happend in Wenchuan.为什么填has changed?急
