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To cancel down a fraction you need to factorise both the numerator and the denominator. of your fraction. There are different ways of factorising numbers, you can break each. number down into their prime factors (see study guide: Prime Factors), you can find the.
To simplify a numerical fraction, I would cancel off any common numerical factors. For this rational expression (this polynomial fraction), I can similarly cancel off any common numerical or variable factors. The numerator factors as (2)(x); the denominator factors as (x)(x). Anything divided by itself is just 1, so I can cross out any factors common to both the numerator and the denominator. Considering the factors in this particular fraction, I get: Then the simplified form of the expression is: