Answer
$25-16b^2=(5+4b)(5-4b)$
Work Step by Step
Remember that the product of the sum and the difference of the same two terms is the difference of their squares.
Since $\sqrt {25}=5$ and $\sqrt {16b2}=4b$
$25-16b^2=(5+4b)(5-4b)$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 10 - Radical Expressions and Equations - 10-2 Simplifying Radicals - Mixed Review - Page 612: 88
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