Verify that x=−14\displaystyle x = -\frac{1}{4}x=−41 and x=5x = 5x=5 are solutions of 4x2−19x−5=04x^2 - 19x - 5 = 04x2−19x−5=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.