Verify that b=5a2−2b = 5a^2 - 2b=5a2−2 is the subject of a=b+25\displaystyle a = \sqrt{\frac{b+2}{5}}a=5b+2
210 exam-style questions on OCR GCSE Maths Changing the Subject of a Formula. Each one has a worked solution and a mark scheme showing where the marks go.