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Adding and Subtracting Radical Expressions  Problem 7
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
Since a root written in simple radical form is actually more exact than a rounded decimal, we use the roots in real life situations, including geometry areas and perimeters. Remember that you can add or subtract radicals if and only if they have the same number under the radical sign. You might need to do some simplifying to tell if this is the case. The numbers outside the radical get added or subtracted, and the radicand, or the number under the square root, remains unchanged.
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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.
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Sample Problems (9)
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Adding and Subtracting Radical Expressions
Problem 1 10,079 viewsSimplify:
8√3 − 5√3 + 10√3 
Adding and Subtracting Radical Expressions
Problem 2 8,694 viewsSimplify:
4√5 − 3√45 + 10√80 
Adding and Subtracting Radical Expressions
Problem 3 7,113 viewsSimplify:
√125x + 4√20x − 3√45x 
Adding and Subtracting Radical Expressions
Problem 4 6,304 viewsSimplify:
3√x + y√x + 2√y²x 
Adding and Subtracting Radical Expressions
Problem 5 957 views 
Adding and Subtracting Radical Expressions
Problem 6 1,209 views 
Adding and Subtracting Radical Expressions
Problem 7 788 views 
Adding and Subtracting Radical Expressions
Problem 8 635 views 
Adding and Subtracting Radical Expressions
Problem 9 639 views
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