Подставим значение $$y = -\frac{1}{12}$$ в выражение:
$$(5 - y)^2 - y(y + 2) = (5 - (-\frac{1}{12}))^2 - (-\frac{1}{12})(-\frac{1}{12} + 2)$$
$$= (5 + \frac{1}{12})^2 + \frac{1}{12}(-\frac{1}{12} + \frac{24}{12})$$
$$= (\frac{60}{12} + \frac{1}{12})^2 + \frac{1}{12}(\frac{23}{12})$$
$$= (\frac{61}{12})^2 + \frac{23}{144}$$
$$= \frac{3721}{144} + \frac{23}{144}$$
$$= \frac{3744}{144}$$
$$= 26$$
**Ответ: 26**