Verify that a2+3a−40=(a+8)(a−5)a^2 + 3a - 40 = (a+8)(a-5)a2+3a−40=(a+8)(a−5)
Verify that a=5a=5a=5 and a=−8a=-8a=−8 solve a2+3a−40=0a^2 + 3a - 40 = 0a2+3a−40=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.