Write 45 \sqrt{45}\,45 in the form a5a\sqrt{5}a5, where a a\,a is an integer.
[1]
b.
Express 2(3+5)(3−5)\displaystyle \frac{2(3 + \sqrt{5})}{(3 - \sqrt{5})}(3−5)2(3+5) in the form b+c5b + c\sqrt{5}b+c5, where b b\,b and c c\,c are integers.
[5]
Markscheme
Indices and Surds Questions
12 exam-style questions on Edexcel A Level Old Maths Indices and Surds. Each one has a worked solution and a mark scheme showing where the marks go.