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# Partial fractions

Before you have learnt how to combine together different fractions to bring them under one denominator. However, sometimes you are required to do the opposite: split a fraction into distinct terms. In IB you will only be asked to split up fractions with two distinct linear terms in the denominator.
2. Equate the fraction to sum of two fractions with unknown constants as numerators and the linear terms as denominators

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Partial Fractions are the fractions that are formed when a complex rational expression is split into two or more simpler fractions. Generally, fractions with algebraic expressions are difficult to solve and hence we use the concepts of partial fractions to split the fractions into numerous subfractions. While decomposition, generally, the denominator is an algebraic expression, and this expression is factorized to facilitate the process of generating partial fractions. A partial fraction is a reverse of the process of the addition of rational expressions.

Solving partial fractions problems

- Determine which linear terms make up the denominator

** x ^{2} + x − 2 = (x − 1)(x + 2)**

3. Multiply by the linear terms on both sides and determine the constant terms

4. Plug in constant terms into the original equation

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