5a根号3ab²-(b根号27a三次方-3ab根号4分之3a)(b<0)
问题描述:
5a根号3ab²-(b根号27a三次方-3ab根号4分之3a)(b<0)
答
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