来自刘风翘的问题
【单项式-2x2y,-12xy2,2x2y,-xy2的和是___.】
单项式-2x2y,-12xy2,2x2y,-xy2的和是___.
1回答
2020-06-14 01:07
【单项式-2x2y,-12xy2,2x2y,-xy2的和是___.】
单项式-2x2y,-12xy2,2x2y,-xy2的和是___.
这4个单项式的和=-2x2y+(-12