Verify that (3x+4)(3x−5)=9x2−3x−20(3x+4)(3x-5)=9x^2 - 3x - 20(3x+4)(3x−5)=9x2−3x−20
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.