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Adding and Subtracting Rational Expressions  Problem 5
Alissa Fong
Alissa Fong
MA, Stanford University
Teaching in the San Francisco Bay Area
Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts
To add and subtract rational expressions, or any kind of fraction, we need to have exactly the same denominator. If the original problem was subtraction, you need to be very precise with how you distribute the negative. Combine like terms in your new numerator, factor the top and bottom if possible, and reduce if possible. Domain restrictions are any value of x that would make either of the original denominators zero.
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Alissa Fong
M.A. in Secondary Mathematics, Stanford University
B.S., Stanford University
Alissa has a quirky sense of humor and a relatable personality that make it easy for students to pay attention and understand the material. She has all the math tips and tricks students are looking for.
Sample Problems (9)
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Adding and Subtracting Rational Expressions
Problem 1 6,529 viewsSimplify:
4 + 2 7 + 14x 5 + 10x 
Adding and Subtracting Rational Expressions
Problem 2 5,494 viewsSimplify:
2 − x − 3 x − 2 x² + 2x + 4 x³ − 8 
Adding and Subtracting Rational Expressions
Problem 3 5,025 viewsSimplify:
4b − 3b b² + 6b + 5 b² + 5b + 4 
Adding and Subtracting Rational Expressions
Problem 4 1,213 views 
Adding and Subtracting Rational Expressions
Problem 5 1,163 views 
Adding and Subtracting Rational Expressions
Problem 6 1,224 views 
Adding and Subtracting Rational Expressions
Problem 7 1,217 views 
Adding and Subtracting Rational Expressions
Problem 8 1,086 views 
Adding and Subtracting Rational Expressions
Problem 9 1,190 views
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