分母带根号如何化简?
问题描述:
分母带根号如何化简?
答
简单啊,分母有理化.如:(根号2-1)/根号2=((根号2-1)根号2)/2
又如(根号2-1)/(根号2+1)=(根号2-1)^2/(根号2-1)(根号2+1)
=(3-2根号2)/1=3-2根号2