有關3x2yb的精選大全

若-7xay4與3x2yb是同類項,則a-b的值為                      (    )A....
問題詳情:若-7xay4與3x2yb是同類項,則a-b的值為                      (    )A. 2            B.–2           C.  4         D. -4【回答】B知識點:整式...
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