Внесите множитель под знак корня:
1) $7\sqrt{2}$;
2) $3\sqrt{13}$;
3) $-2\sqrt{17}$;
4) $-10\sqrt{14}$;
5) $5\sqrt{8}$;
6) $6\sqrt{a}$;
7) $\frac{1}{4}\sqrt{32}$;
8) $-\frac{2}{3}\sqrt{54}$;
9) $\frac{1}{8}\sqrt{128a}$;
10) $-0,3\sqrt{10b}$;
11) $3\sqrt{\frac{1}{3}}$;
12) $\frac{2}{9}\sqrt{\frac{27}{28}}$.
$7\sqrt{2} = \sqrt{7^2} * \sqrt{2} = \sqrt{49} * \sqrt{2} = \sqrt{49 * 2} = \sqrt{98}$
$3\sqrt{13} = \sqrt{3^2} * \sqrt{13} = \sqrt{9} * \sqrt{13} = \sqrt{9 * 13} = \sqrt{117}$
$-2\sqrt{17} = -\sqrt{2^2} * \sqrt{17} = -\sqrt{4} * \sqrt{17} = -\sqrt{4 * 17} = -\sqrt{68}$
$-10\sqrt{14} = -\sqrt{10^2} * \sqrt{14} = -\sqrt{100} * \sqrt{14} = -\sqrt{100 * 14} = -\sqrt{1400}$
$5\sqrt{8} = \sqrt{5^2} * \sqrt{8} = \sqrt{25} * \sqrt{8} = \sqrt{25 * 8} = \sqrt{200}$
$6\sqrt{a} = \sqrt{6^2} * \sqrt{a} = \sqrt{36} * \sqrt{a} = \sqrt{36a}$
$\frac{1}{4}\sqrt{32} = \sqrt{(\frac{1}{4})^2} * \sqrt{32} = \sqrt{\frac{1}{16}} * \sqrt{32} = \sqrt{\frac{1}{16} * 32} = \sqrt{2}$
$-\frac{2}{3}\sqrt{54} = -\sqrt{(\frac{2}{3})^2} * \sqrt{54} = -\sqrt{\frac{4}{9}} * \sqrt{54} = -\sqrt{\frac{4}{9} * 54} = -\sqrt{4 * 6} = -\sqrt{24}$
$\frac{1}{8}\sqrt{128a} = \sqrt{(\frac{1}{8})^2} * \sqrt{128a} = \sqrt{\frac{1}{64}} * \sqrt{128a} = \sqrt{\frac{1}{64} * 128a} = \sqrt{2a}$
$-0,3\sqrt{10b} = -\sqrt{0,3^2} * \sqrt{10b} = -\sqrt{0,09} * \sqrt{10b} = -\sqrt{0,09 * 10b} = -\sqrt{0,9b}$
$3\sqrt{\frac{1}{3}} = \sqrt{3^2} * \sqrt{\frac{1}{3}} = \sqrt{9} * \sqrt{\frac{1}{3}} = \sqrt{9 * \frac{1}{3}} = \sqrt{3}$
$\frac{2}{9}\sqrt{\frac{27}{28}} = \sqrt{(\frac{2}{9})^2} * \sqrt{\frac{27}{28}} = \sqrt{\frac{4}{81}} * \sqrt{\frac{27}{28}} = \sqrt{\frac{4}{81} * \frac{27}{28}} = \sqrt{\frac{1}{3} * \frac{1}{7}} = \sqrt{\frac{1}{21}}$
Пожауйста, оцените решение