Write 175−22\displaystyle \frac{17}{5-2\sqrt{2}}5−2217 in the form a+b2a+b\sqrt{2}a+b2, where a a\,a and b b\,b are integers to be found.
233 exam-style questions on Edexcel A Level Maths Algebraic Expressions, covering 1.1 Index Laws, 1.2 Expanding Brackets, 1.3 Factorising, 1.4 Negative and Fractional Indices, and 1.5 Surds. Each one has a worked solution and a mark scheme showing where the marks go.