| Exam Board | Edexcel |
|---|
| Module | C1 (Core Mathematics 1) |
|---|
| Topic | Indices and Surds |
|---|
1.
$$f ( x ) = ( \sqrt { x } + 3 ) ^ { 2 } + ( 1 - 3 \sqrt { x } ) ^ { 2 }$$
Show that \(\mathrm { f } ( x )\) can be written in the form \(a x + b\) where \(a\) and \(b\) are integers to be found.