ab-(2ab-3a^2b)怎么算?
问题描述:
ab-(2ab-3a^2b)怎么算?
答
ab-(2ab-3a^2b)
=ab-2ab+3a^2b
=-ab+3a^2b
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答
原式=ab-2ab+3a^2b
=-ab+3a^2b