Answer
$-6$
Work Step by Step
Recall:
$(a-b)(a+b) = a^2-b^2$
Use the rule above with $a=\sqrt5$ and $b=\sqrt{11}$ to obtain:
\begin{align*}
&=(\sqrt5)^2-(\sqrt{11})^2\\
&=5-11\\
&=-6
\end{align*}
Algebra 2 Common Core
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133186024
ISBN 13:
978-0-13318-602-4
Chapter 6 - Radical Functions and Rational Exponents - Chapter Review - Page 424: 30
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