Write (3+5)2(3 + \sqrt{5})^2(3+5)2 in the form a+b5a + b\sqrt{5}a+b5, where a a\,a and b b\,b are integers.
Hence find (3+5)2−(3−5)2(3 + \sqrt{5})^2 - (3 - \sqrt{5})^2(3+5)2−(3−5)2.
217 exam-style questions on WJEC GCSE Maths Surds. Each one has a worked solution and a mark scheme showing where the marks go.