Verify that x=4x=4x=4 and x=8x=8x=8 are solutions of x2−12x+32=0x^2 - 12x + 32 = 0x2−12x+32=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.