By completing the square, solve x2+8x−4=0x^2 + 8x - 4 = 0x2+8x−4=0 Give your answers in surd form.
Practise OCR GCSE Maths Completing the Square with exam-style questions for Foundation and Higher tier. 56 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.