ab-(2ab-3a^2b)怎么算?
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ab-(2ab-3a^2b)怎么算?ab-(2ab-3a^2b)怎么算?ab-(2ab-3a^2b)怎么算?原式=ab-2ab+3a^2b=-ab+3a^2bab-(2ab-3a^2b)=ab-2ab
ab-(2ab-3a^2b)怎么算?
ab-(2ab-3a^2b)怎么算?
ab-(2ab-3a^2b)怎么算?
原式=ab-2ab+3a^2b
=-ab+3a^2b
ab-(2ab-3a^2b)
=ab-2ab+3a^2b
=-ab+3a^2b
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