\(\sqrt{0}=0\)

\(\sqrt{25}=5\)

\(\sqrt{225}=15\)

\(\sqrt{4}-\sqrt{36}=2-6=-4\)

\(8\sqrt{25}+9\sqrt{144}=8⋅5+9⋅12=148\)

\(\sqrt{9}⋅\sqrt{4}=3⋅2=6\)

\(\sqrt{8^2+80}=\sqrt{64+80}=\sqrt{144}=12\)

\(-\sqrt{100}=-10\)

\(\sqrt{-64}\) kan niet.

\(\sqrt{12^2}=12\)

\(\sqrt{(-9)^2}=\sqrt{81}=9\)

\(7⋅\sqrt{81}=7⋅9=63\)

\({5\sqrt{5} \over 3}=1\frac{2}{3}\sqrt{5}\text{.}\)

\(3\sqrt{3}+2\sqrt{3}=5\sqrt{3}\)

\(12\sqrt{5}-7\sqrt{3}\) kan niet korter.

\(5\sqrt{3}⋅3\sqrt{12}=15⋅\sqrt{36}=15⋅6=90\)

\(5\sqrt{2}⋅6\sqrt{11}=30\sqrt{22}\)

\({\sqrt{42} \over \sqrt{7}}=\sqrt{6}\)

\({40\sqrt{30} \over 5\sqrt{6}}={40 \over 5}⋅{\sqrt{30} \over \sqrt{6}}=8\sqrt{5}\)

\({14\sqrt{45} \over 2\sqrt{5}}={14 \over 2}⋅{\sqrt{45} \over \sqrt{5}}=7⋅\sqrt{9}=7⋅3=21\)

\((3\sqrt{6})^2=3^2⋅\sqrt{6}^2=9⋅6=54\text{.}\)

\((\sqrt{2})^2=2\text{.}\)

\(3(\sqrt{10})^2=3⋅10=30\text{.}\)

\((-4\sqrt{2})^2-9(\sqrt{5})^2=(-4)^2⋅(\sqrt{2})^2-9⋅(\sqrt{5})^2=16⋅2-9⋅5=-13\text{.}\)