Show that 27+72+7\displaystyle \frac{2\sqrt{7} + 7}{2 + \sqrt{7}}2+727+7 can be written as 7\sqrt{7}7
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.