=2ab根号下3a-ab/2根号下3a+ab根号下3a
=5ab/2根号下3a过程具体点，因为是计算题。过程就是这样的了=2ab根号下3a-ab/2根号下3a+ab根号下3a=（2ab-ab/2+ab)根号下3a=5ab/2根号下3a