Odpowiedź:
[tex]6.a)4( \sqrt{13} {)}^{2} = 4 \times 13 = 52 \\ b)5 \sqrt{2} \times 4 \sqrt{2 } = 20 \times 2 = 40 \\ c)( \frac{9}{10} \sqrt{5} {)}^{2} = \frac{81}{100} \times 5 = \frac{81}{20} = 4 \frac{1}{20} \\ 7. \: a) \frac{12 \sqrt{15} }{4 \sqrt{15} } = 3 \\ b)4 \sqrt{13} + 3 \sqrt{13} = 7 \sqrt{13} \\ c) \frac{5 + 10 \sqrt[3]{2} }{5} = \frac{5}{5} + \frac{10 \sqrt[3]{2} }{5} = 1 + 2 \sqrt[3]{2} \\ d)3 \sqrt[3]{6} + 4 \sqrt[3]{6} + 2 \sqrt[3]{ - 6} = 7 \sqrt[3]{6} - 2 \sqrt[3]{6} = 5 \sqrt[3]{6} [/tex]
