1.
[tex]a = \sqrt{4}+\sqrt{9} + \sqrt{4+9} = 2 + 3 +\sqrt{13} \approx5+3,6\approx 8,6\\\\8 < a < 9\\\\Odp. \ B[/tex]
2.
[tex](3\sqrt{5})^{2}+(4\sqrt{3})^{2} = 9\cdot5 + 16\cdot 3 = 45+48 = 93\\\\Odp. \ B.[/tex]
3.
[tex]a = \sqrt{17^{2}} = 17\\\\b = (2\sqrt{5})^{2} = 4\cdot5 = 20\\\\c = \sqrt{11}\cdot\sqrt{11} = \sqrt{11\cdot11} = \sqrt{11^{2}} = 11\\\\d =\sqrt{15\cdot3\cdot5} = \sqrt{15\cdot15} = \sqrt{15^{2}} = 15\\\\Odp. \ C. \ wszystkie[/tex]
4.
[tex]\sqrt[3]{-5}+2(-\sqrt[3]{5}-3\sqrt[3]{5}) = -\sqrt[3]{5}+2\cdot(-4\sqrt[3]{5}) = -\sqrt[3]{5}-8\sqrt[3]{5} = -9\sqrt[3]{5}\\\\Odp. \ B.[/tex]
