Verify that x2−x−12x2−9x+20\displaystyle \frac{x^2 - x - 12}{x^2 - 9x + 20}x2−9x+20x2−x−12 simplifies to x+3x−5\displaystyle \frac{x+3}{x-5}x−5x+3
255 exam-style questions on Edexcel GCSE Maths Algebraic Fractions. Each one has a worked solution and a mark scheme showing where the marks go.