 # 10.4 Addition and Subtraction: Like Denominators Goal: to add and subtract rational expressions with like denominators.

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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.

3m

3x 2 +4x-15 - 454

x + 4 Factors of ACSum=B

Subtracting RE When you subtract a RE remember to distribute the minus sign to the numerator of the 2 nd RE

Subtract:

Subtract Rational Expressions

Subtract fractions: ( ) 2

Subtract fractions:

Assignment Page 443 2-32 even Answer must be factored