Question

How do you simplify `sqrt 78 - sqrt 8 + sqrt 128`?

Answer 1

`sqrt(78)-sqrt(8)+sqrt(128)`

`sqrt(2*3*13)-sqrt(2^3)+sqrt(2^7)`

`sqrt(78)-sqrt(2^2*2)+sqrt(2^6*2)`

`sqrt(78)-2sqrt(2)+2^3sqrt(2)`

`sqrt(78)-6sqrt(2)`