Write (2+7)2(2 + \sqrt{7})^2(2+7)2 in the form a+b7a + b\sqrt{7}a+b7, where a a\,a and b b\,b are integers.
Practise OCR GCSE Maths Surds with exam-style questions for Foundation and Higher tier. 80 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.