Question

Simplify nine square root of two minus three square root of seven-plus square root of eight minus the square root of twenty-eight.

Answer 1

11
`√(2)` - 5√7

Explanation:

= 9
`√(2)` - 3
`√(7)` + 2√2 - 2
`√(7)`

= 11
`√(2)` - 3
`√(7)` - 2
`√(7)` add similar elements

= 11
`√(2)` - 5
`√(7)`

Answer 2

= 11√2 - 5√7

Explanation:

9√2 - 3√7 + √8 - √28

= 9√2 - 3√7 + 2√2 - 2√7

add similar elements

= 11√2 - 3√7 - 2√7

= 11√2 - 5√7