问题标题:
【化简[(3a-4b)(-3a-4b)-(4b-3a)²-3a(1/3ab²+a-b)]÷(-3a)】
问题描述:

化简[(3a-4b)(-3a-4b)-(4b-3a)²-3a(1/3ab²+a-b)]÷(-3a)

任文岚回答:
  [(3a-4b)(-3a-4b)-(4b-3a)²-3a(1/3ab²+a-b)]÷(-3a)   =[(-4b+3a)(-4b-3a)-(4b-3a)²-3a(1/3ab²+a-b)]÷(-3a)   =[16b²-9a²-16b²+24ab-9a²-3a(1/3ab²+a-b)]÷(-3a)   =[24ab-18a²-3a(1/3ab²+a-b)]÷(-3a)   =6a-8b+1/3ab²+a-b   =7a-9b+1/3ab²
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