Chapter 7 - Section 7.5 - Multiplying with More Than One Term and Rationalizing Denominators - Exercise Set - Page 550: 28

$2$

Work Step by Step

RECALL: $(a+b)(a-b)=a^2-b^2$ Use the formula above with $a=\sqrt{6}$ and $b=2$ to obtain: $=(\sqrt{6})^2 - 2^2 \\=6-4 \\=2$

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