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10.4 Addition and Subtraction: Like Denominators. Goal: to add and subtract rational expressions with like denominators. To add and subtract rational expressions with like denominators…. Keep the denominator and add or subtract the numerators (just like adding like terms)
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10.4 Addition and Subtraction: Like Denominators • Goal: to add and subtract rational expressions with like denominators
To add and subtract rational expressions with like denominators… • Keep the denominator and add or subtract the numerators (just like adding like terms) • Remember to simplify your final answer
What does it mean to be simplified? • Your answer has to be completely factored (the numerator and denominator) any common factors must be canceled out
Add & Subtract Rational Expressions When the denominators are the same, add or subtract the numerators and write the sum or difference over the common denominator.
Add & Subtract Rational Expressions 3x2 + 4x -15
Subtracting RE • When you subtract a RE remember to distribute the minus sign to the numerator of the 2nd RE
Subtract fractions: ( ) 2
AssignmentPage 4432-32 even Answer must be factored