\[\boxed{\text{67.\ }\text{еуроки}\text{-}\text{ответы}\text{\ }\text{на}\text{\ }\text{пятёрку}}\]
Пояснение.
Решение.
\[\textbf{а)}\ \frac{x^{2}}{x^{2} - 16} - \frac{8 \cdot (x - 2)}{x^{2} - 16} =\]
\[= \frac{x^{2} - 8 \cdot (x - 2)}{x^{2} - 16} =\]
\[= \frac{x^{2} - 8x + 16}{x^{2} - 16} =\]
\[\textbf{б)}\ \frac{64 - 2ab}{(a - 8)^{2}} + \frac{2ab - a^{2}}{(8 - a)^{2}} =\]
\[= \frac{64 - 2ab}{(a - 8)^{2}} + \frac{2ab - a^{2}}{(a - 8)^{2}} =\]
\[= \frac{64 - 2ab + 2ab - a^{2}}{(a - 8)^{2}} =\]
\[= \frac{8 + a}{8 - a}\]