Adding and Subtracting Rational Expressions Section 9-4 Adding and Subtracting Rational Expressions

Def: to add and subtract rational expressions They must be written as equivalent expressions With a common denominator To simplify we find a common denominator then combine terms in the numerator Example:

1.) Simplify: find common denominator

Find common denominator 2.) Simplify: Find common denominator Then add like terms

Find common denominator 3.) subtract: Find common denominator Then subract

4.) subtract:

Homework Page 573 Problems: 20-33 all