Question

How do you solve `\sqrt { 20} + \sqrt { 30} - \sqrt { 49}`?

Answer 1

`2.949`

Explanation:

`sqrt20+sqrt30-sqrt49`

`:.=sqrt(2*2*5)+sqrt(2*3*5)-sqrt49`

`:.sqrt2*sqrt2=2`

`:.=2*sqrt5+sqrt2*sqrt3*sqrt5-7`

`:.=2sqrt5+sqrt2*sqrt3*sqrt5-7`

`:.=2.949`