Factorise 2x2−21x+542x^2 - 21x + 542x2−21x+54 and hence solve 2x2−21x+54=02x^2 - 21x + 54 = 02x2−21x+54=0
223 exam-style questions on OCR GCSE Maths Factorising Harder Quadratics. Each one has a worked solution and a mark scheme showing where the marks go.