Найдите значение выражения:
1) $\sqrt{108} * \sqrt{3}$;
2) $\sqrt{52} * \sqrt{13}$;
3) $\sqrt{160} * \sqrt{250}$;
4) $\sqrt{0,4} * \sqrt{4,9}$;
5) $\frac{\sqrt{288}}{\sqrt{2}}$;
6) $\frac{\sqrt{90}}{\sqrt{0,225}}$.
$\sqrt{108} * \sqrt{3} = \sqrt{108 * 3} = \sqrt{36 * 3 * 3} = \sqrt{36} * \sqrt{3^2} = 6 * 3 = 1$
$\sqrt{52} * \sqrt{13} = \sqrt{52 * 13} = \sqrt{4 * 13 * 13} = \sqrt{4} * \sqrt{13^2} = 2 * 13 = 26$
$\sqrt{160} * \sqrt{250} = \sqrt{160 * 250} = \sqrt{16 * 10 * 25 * 10} = \sqrt{16} * \sqrt{25} * \sqrt{10^2} = 4 * 5 * 10 = 20 * 10 = 200$
$\sqrt{0,4} * \sqrt{4,9} = \sqrt{0,4 * 4,9} = \sqrt{4 * 49 * 0,01} = \sqrt{4} * \sqrt{49} * \sqrt{0,01} = 2 * 7 * 0,1 = 14 * 0,1 = 1,4$
$\frac{\sqrt{288}}{\sqrt{2}} = \sqrt{\frac{288}{2}} = \sqrt{144} = 12$
$\frac{\sqrt{90}}{\sqrt{0,225}} = \sqrt{\frac{90}{0,225}} = \sqrt{\frac{9}{0,0225}} = \frac{\sqrt{9}}{\sqrt{0,0225}} = \frac{3}{0,15} = \frac{300}{15} = 20$
Пожауйста, оцените решение