Multiplying Radicals
Example 1
Multiplying radicals
Multiply and simplify.

Solution
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Distributive property |
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Because
and
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To square a sum, we
use (a + b)2 = a2 + 2ab + b2:

Helpful hint
Students often write
Although this is correct, you
should get used to the idea
that
Because of the definition of a
square root,
for
any positive number a.
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