IGCSE Maths / Advanced algebra
Simplifying algebraic fractions
Edexcel International GCSE Maths (4MA1), chapter 23: Advanced algebra, specification point 2.2c. Part of the full course.
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To simplify an algebraic fraction, factorise the numerator and denominator, then cancel any identical brackets that are multiplied. This matters because cancellation only works on whole factors, not on terms joined by addition or subtraction.