Question

How do you simplify `sqrt21*sqrt14`#?

Answer 1

`7sqrt6`

Explanation:

`sqrt21*sqrt14`

Use the rule:

`sqrta * sqrtb = sqrt(a*b)`

`sqrt21*sqrt14 = sqrt(21*14)=sqrt294=sqrt(7*7*6)`

`=sqrt(7^2*6)=7sqrt6`