3a与5a2-3a-5的和是()A.5a-5B.5a2-6a-5C.5a2-5D.5a2+5-数学

题目简介

3a与5a2-3a-5的和是()A.5a-5B.5a2-6a-5C.5a2-5D.5a2+5-数学

题目详情

3a与5a2-3a-5的和是(  )
A.5a-5B.5a2-6a-5C.5a2-5D.5a2+5
题型:单选题难度:偏易来源:不详

答案

3a+5a2-3a-5=5a2-5.
故选C.

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