Solve b2−13b+36=0b^2 - 13b + 36 = 0b2−13b+36=0
Hence solve x4−13x2+36=0x^4 - 13x^2 + 36 = 0x4−13x2+36=0
203 exam-style questions on OCR GCSE Maths Solving Quadratics. Each one has a worked solution and a mark scheme showing where the marks go.