№5. Вычислите: √85²-84² - 1/36 ⋅ 1/6

$$√{\frac{85^2-84^2}{36}} - \frac{1}{6} = √{\frac{(85-84)(85+84)}{36}} - \frac{1}{6} = √{\frac{1 \cdot 169}{36}} - \frac{1}{6} = \frac{√{169}}{√{36}} - \frac{1}{6} = \frac{13}{6} - \frac{1}{6} = \frac{12}{6} = 2$$.

Ответ: 2