Simplify fully x2−4x−21x2−10x+21\displaystyle \frac{x^2 - 4x - 21}{x^2 - 10x + 21}x2−10x+21x2−4x−21
64 exam-style questions on AQA GCSE Maths Algebraic Fractions. Each one has a worked solution and a mark scheme showing where the marks go.