I. Вычислите:

1. $$\sqrt{14,84} : \sqrt{\frac{1}{4}} - \sqrt{2,56} \cdot \sqrt{4900} = 3.85 : 0.5 - 1.6 \cdot 70 = 7.7 - 112 = -104.3$$ 2. $$(\frac{1}{4} \sqrt{126})^2 + (-4\sqrt{5})^2 - 0.6\sqrt{3025} = \frac{1}{16} \cdot 126 + 16 \cdot 5 - 0.6 \cdot 55 = \frac{63}{8} + 80 - 33 = 7.875 + 47 = 54.875$$