Verify that x=−3x=-3x=−3 and x=45\displaystyle x=\frac{4}{5}x=54 are solutions of 5x2+11x−12=05x^2 + 11x - 12 = 05x2+11x−12=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.