Adding, Subtracting, and Multiplying Radical …
[Pages:24]Notes 10-2
Adding, Subtracting, and Multiplying Radical Expressions
I. Adding and Subtracting Radical Expressions
A. Like Radicals
Square-root expressions with the same radicand are examples of like radicals.
Helpful Hint Combining like radicals is similar to combining like terms.
COMPARE:
You can combine like radicals by adding or subtracting the numbers multiplied by the radical and keeping the radical the same.
B. Basic Examples
Example 1: Adding and Subtracting Square-Root Expressions
Add or subtract. A.
The terms are like radicals.
B. The terms are unlike radicals. Do not combine.
Add or subtract. C.
D.
the terms are like radicals. Combine like radicals.
Identify like radicals. Combine like radicals.
More Examples Add or subtract.
a.
b.
The terms are like radicals. Combine like radicals.
The terms are like radicals. Combine like radicals.
Add or subtract. c.
d.
The terms are like radicals. Combine like radicals.
Identify like radicals. Combine like radicals.
C. Simplifying before combining
Sometimes radicals do not appear to be like until they are simplified. Simplify all radicals in an expression before trying to identify like radicals.
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