5a根号3ab²-(b根号27a三次方-3ab根号4分之3a)(b<0)

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5a根号3ab²-(b根号27a三次方-3ab根号4分之3a)(b<0)
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5a根号3ab²-(b根号27a三次方-3ab根号4分之3a)(b<0)
5a根号3ab²-(b根号27a三次方-3ab根号4分之3a)(b<0)

5a根号3ab²-(b根号27a三次方-3ab根号4分之3a)(b<0)
5a根号3ab²-(b根号27a三次方-3ab根号4分之3a)(b<0)
=-5ab根号3a-(3ab根号3a-3/2ab根号3a)
=-5ab根号3a-3/2ab根号3a
=-13/2ab根号3a