是五次四項式，單項式-5x2ny6-m的次數與這個多項式的次數相同，則m2+n2=________．科目：初中數學 來源： 題型：閱讀理解
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是五次四項式，而單項式
的次數與該多項式的次數相同，則n的值是______．
是五次四項式，單項式
與該多項式的次數相同，則m=
，n= ．
是五次四項式，則
是________。