
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) $$(5\sqrt{2}-\sqrt{18})\sqrt{2} = (5\sqrt{2} - \sqrt{9 \cdot 2})\sqrt{2} = (5\sqrt{2} - 3\sqrt{2})\sqrt{2} = 2\sqrt{2} \cdot \sqrt{2} = 2 \cdot 2 = 4$$.
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: $$11 - 6\sqrt{2}$$