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Rational expressionsTechnique

Technique

Rational expressions

Factor, then cancel factors or share a denominator

3 min 3 steps

A fraction with x's in it follows the same rules as one-half. Its factors are hidden, though, and I respect a good hiding place.

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Calls on

Fraction and decimal operationsFactCommon denominators to add, flip and multiply to divide
Factor polynomialsTechniquePull out the common factor, then match a pattern

Used by

Rewrite into an equivalent formTacticAim for the choices' form, then check with a number
Find constants from an identityTacticMatch every power of x and the constants fall out