初三的二次根式
问题描述:
初三的二次根式
6/3根号2+2根号3
ab/根号a平方b-根号ab平方
这两题题分母有理化
我把题目写的清晰一点
6/(3√2+2√3)
ab/(√a^b-√ab^)
答
6/(3√2+2√3)
=6*(3√2-2√3)/[(3√2+2√3)*(3√2-2√3)]
=6*(3√2-2√3)/[18-12]
=(3√2-2√3)
ab/(√a^2b-√ab^2)
=ab*(√a^2b+√ab^2)/[(√a^2b-√ab^2) *(√a^2b+√ab^2]
=ab*(√a^2b+√ab^2)/(a^2b-ab^2)
=(√a^2b+√ab^2)/(a-b)
分数给我吧?嘿嘿!