Answer
$-6$
Work Step by Step
Recognize that the factorization of ($a^2-b^2)$ is $(a+b)(a-b)$
$(2+\sqrt{10})(2-\sqrt{10})=(2^2-(\sqrt{10})^2)=4-10=-6$
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 - 10-3 Operations with Radial Expressions - Practice and Problem-Solving Exercises - Page 616: 27
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