$$4 m ^ { 4 } + 12 m ^ { 2 } n ^ { 2 } + 9 n ^ { 4 } , m = \frac { 1 } { 2 } n = \frac { 1 } { 3 }$$
$m=\frac{n}{2}\text{, }n=\frac{\sqrt{14}\sqrt[4]{o}}{7}\text{, }o\geq 0$
$m=\frac{n}{2}\text{, }n=-\frac{\sqrt{14}\sqrt[4]{o}}{7}\text{, }o\geq 0$
