Ответ:
\(36a^2+12ab+b^2=(6a+b)^2\).
\(\sqrt{(6a+b)^2}=|6a+b|\).
\(6a+b=6\cdot\frac{4}{5}+8\frac{1}{5}=\frac{24}{5}+\frac{41}{5}=13\).
Ответ: 13
\(36a^2+12ab+b^2=(6a+b)^2\).
\(\sqrt{(6a+b)^2}=|6a+b|\).
\(6a+b=6\cdot\frac{4}{5}+8\frac{1}{5}=\frac{24}{5}+\frac{41}{5}=13\).
Ответ: 13