Question

How do you solve `sqrt(k+7)=3sqrt2` and check your solution?

Answer 1

`k=11`

Explanation:

`sqrt(k+7)=3sqrt2`
`=>(sqrt(k+7))^2=(3sqrt2)^2`
`=>k+7=18`
`=>k=11`
`sqrt(11+7)=3sqrt2`