Question

根号下6²-(2/3)²等于多少？

Answer 1

根号下6方-（2/3）方
=（根号下36-2/3）方
=（根号下106/3）方
=（318/3）方
=106/3
=35.33333333333

Answer 2

1. 可以先用平方差：

   原式=根号下[(6+2/3)(6-2/3)]

   =根号下[(20/3)(16/3)]

   =根号下[(20*16)/9]

2. 再开个根号：

   =(4倍根号20)/3

   =(8倍根号5)/3

   =(8/3)倍根号5