Question

Subtract the radical expression. Simplify if needed.

Answer 1

7
`√(7)`

Explanation:

Take 9 out of
`√(63)`

You get 3
`√(7)`

Take 4 out of
`√(28)`

You get 2
`√(7)`

So, 3(3
`√(7)`) - 2
`√(7)`

= 9 
`√(7)` - 2
`√(7)`

=7
`√(7)`