| Exam Board | Edexcel |
|---|---|
| Module | C1 (Core Mathematics 1) |
| Year | 2007 |
| Session | June |
| Marks | 2 |
| Paper | Download PDF ↗ |
| Mark scheme | Download PDF ↗ |
| Topic | Indices and Surds |
| Type | Expand and simplify surd expressions |
| Difficulty | Easy -1.8 This is a straightforward application of the difference of two squares formula (a+b)(a-b)=a²-b², requiring only one step to reach the answer of 9-5=4. It's a routine C1 exercise testing basic algebraic manipulation with surds, significantly easier than average A-level questions. |
| Spec | 1.02b Surds: manipulation and rationalising denominators |
Simplify $( 3 + \sqrt { } 5 ) ( 3 - \sqrt { } 5 )$.\\
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\hfill \mbox{\textit{Edexcel C1 2007 Q1 [2]}}