Solve x2+kx−7=0x^2 + kx - 7 = 0x2+kx−7=0
Give your answers in terms of k k\,k in the form a±bca \pm b\sqrt{c}a±bc.
156 exam-style questions on OCR GCSE Maths Quadratic Formula. Each one has a worked solution and a mark scheme showing where the marks go.