1. Упростите выражение:
a) $$10\sqrt{3}-4\sqrt{48}-\sqrt{75} = 10\sqrt{3}-4\sqrt{16\cdot 3}-\sqrt{25\cdot 3} = 10\sqrt{3}-4\cdot 4\sqrt{3}-5\sqrt{3} = 10\sqrt{3}-16\sqrt{3}-5\sqrt{3} = -11\sqrt{3}$$
Ответ: $$-11\sqrt{3}$$
б) $$(5\sqrt{2}-\sqrt{18})\cdot \sqrt{2} = (5\sqrt{2}-\sqrt{9\cdot 2})\cdot \sqrt{2} = (5\sqrt{2}-3\sqrt{2})\cdot \sqrt{2} = 2\sqrt{2}\cdot \sqrt{2} = 2 \cdot 2 = 4$$
Ответ: 4
в) $$(3-\sqrt{2})^2 = 3^2 - 2\cdot 3\cdot \sqrt{2} + (\sqrt{2})^2 = 9 - 6\sqrt{2} + 2 = 11 - 6\sqrt{2}$$
Ответ: $$11 - 6\sqrt{2}$$