Question

Simplify the following expressions.
$(\sqrt{3}+\sqrt{7}{)}^2$

Answer 1

$(\sqrt{3}+\sqrt{7}{)}^2$

$=(\sqrt{3}{)}^2+2\times \sqrt{3}\times \sqrt{7}+(\sqrt{7}{)}^2$

$=3+2\sqrt{21}+7$

$=10+2\sqrt{21}$