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Adding & Subtracting Rational Expressions. Objectives Students will be able to find the Lowest common denominator Students will be able to add & subtract Rational Expressions with like and unlike denominators. We know that….
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Adding & Subtracting Rational Expressions Objectives Students will be able to find the Lowest common denominator Students will be able to add & subtract Rational Expressions with like and unlike denominators.
We know that… • …in order to add or subtract any fraction, there must be a common denominator. • …adding and subtracting only happen in the numerator (top) of the fraction, NEVER IN THE DENOMINATOR (BOTTOM). • …we can take this same approach with RATIONAL EXPRESSIONS (ALGEBRAIC FRACTIONS).
Example: Monomials in Denominator & Numerator Always, always Simplify! a) b) Add Numerators Common Denominators Always, always Simplify! Add Numerators Common Denominators
Example: Binomials in Denominator a) b) c) d)
Example: Binomials in Numerator & Denominator a) b) Distribute the Negative!! Always Look to Factor