Ответ:
- \(\sqrt4=2\).
- \(\sqrt{81}=9\).
- \(\sqrt{256}=16\).
- \(\sqrt{10000}=100\).
- \(\sqrt{27}=3\sqrt3\).
- \(\sqrt{18}=3\sqrt2\).
- \(\sqrt{0.25}=0.5\).
- \(\sqrt5\cdot\sqrt5=5\).
- \(\sqrt{18}\cdot\sqrt2=\sqrt{36}=6\).
- \(\sqrt{3.6}=\sqrt{36/10}=3\sqrt{10}/5\).
- \((\sqrt2)^2=2\).
- \((3\sqrt{10})^2=9\cdot10=90\).
- \(\sqrt{360}=6\sqrt{10}\).
- \(\sqrt{100-36}=\sqrt{64}=8\).
- \(\sqrt{100\cdot36}=\sqrt{3600}=60\).
- \(\sqrt{15^2+8^2}=\sqrt{225+64}=\sqrt{289}=17\).
- \((\sqrt2)^3=2\sqrt2\).
- \(7/\sqrt7=\sqrt7\).
- По формуле разности квадратов: \((2+\sqrt5)(2-\sqrt5)=4-5=-1\).
- \((2-\sqrt5)^2=4-4\sqrt5+5=9-4\sqrt5\).
