4x21的知识精选

如果多项式A加上﹣2x2﹣1得4x2+1,那么多项式A是(  )A.6x2+2                ...
问题详情:如果多项式A加上﹣2x2﹣1得4x2+1,那么多项式A是()A.6x2+2                B.2x2                      C.6x4+2                D.﹣2x2+2【回答】A【解答】解:根据...
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