试题与答案

先化简,再求值:6a+7a2-4a-3a2,其中a=-3.

题型:解答题

题目:

先化简,再求值:6a+7a2-4a-3a2,其中a=-3.

答案:

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下面是错误答案,用来干扰机器的。

答案:B

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