√54 1) √6 2)√2-√18 3) √72 √2 4)√7-√7 2 5) √210 6) √(-11)² 7) (13) 8)√25-81 100 9) √16 10) √x8, при х = 2

\[\frac{\sqrt{54}}{\sqrt{6}} = \sqrt{\frac{54}{6}} = \sqrt{9} = 3\]

\[\sqrt{2} \cdot \sqrt{18} = \sqrt{2 \cdot 18} = \sqrt{36} = 6\]

\[\frac{\sqrt{72}}{\sqrt{2}} = \sqrt{\frac{72}{2}} = \sqrt{36} = 6\]

\[\sqrt{7} \cdot \sqrt{7} = \sqrt{7 \cdot 7} = \sqrt{49} = 7\]

\[\sqrt{2^{10}} = 2^{10/2} = 2^5 = 32\]

\[\sqrt{(-11)^2} = |-11| = 11\]

\[(\sqrt{13})^2 = 13\]

\[\sqrt{25 \cdot 81} = \sqrt{25} \cdot \sqrt{81} = 5 \cdot 9 = 45\]

\[\sqrt{\frac{100}{16}} = \frac{\sqrt{100}}{\sqrt{16}} = \frac{10}{4} = 2.5\]

При \(x = 2\), \[\sqrt{x^8} = \sqrt{2^8} = 2^{8/2} = 2^4 = 16\]