Question

Evaluate sq root 14 multiply sq root 21 ?

Answer 1

`7sqrt6`

Explanation:

`sqrt14 xx sqrt21`

`:.=sqrt(2 xx 7) xx sqrt (3xx7)`

`:.=sqrt2 xx sqrt7 xx sqrt3 xxsqrt7`

`:.sqrt7 xx sqrt7=7`

`:.=7 sqrt 6`