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3. Rewrite each rational expression with the LCD as the denominator. 4. Add/subtract the numerators.
Adding and subtracting rational expressions with like denominators is similar to adding and subtracting fractions with like denominators. It is a three-step process: first add the numerators, then simplify the numerator, then simplify the result by factoring.
First, find the LCM of the unlike denominators to form the LCD. Then write each expression as an equivalent expression by multiplying it by a form of 1 using the LCD. Then, subtract the numerators and write the difference over the LCD. The resulting rational expression can then be simplified. (+) Understand that rational expressions form a system analogous to the rational numbers, closed under addition, subtraction, multiplication, and division by a nonzero rational expression; add, subtract, multiply, and divide rational expressions.
View Homework Help - adding and subtracting rational expressions homework key from MATH AP STATS at Zeeland West High School. Answers: Chapter 8 Rational . Multiplying and Dividing Rational Expressions More help with rational expressions at counting.ga Adding and Subtracting Rational Expressions - next lesson Simplifying Rational Expressions - previous lesson About the Author. Welcome to MathPortal.