Сократите дробь: (a^2-8ab+16b^2)/(12b-3a).

\[\frac{a^{2} - 8ab + 16b^{2}}{12b - 3a} = \frac{(a - 4b)^{2}}{3(4b - a)} =\]

\[= \frac{(4b - a)^{2}}{3(4b - a)} = \frac{4b - a}{3}.\]