$$\left. \begin{array} { l } { \frac { 7 } { 9 } , - \frac { 5 } { 9 } } \end{array} \right.$$
$-\frac{5}{9},\frac{7}{9}$
$$\frac{7}{9}$$
$$-\frac{5}{9},\frac{7}{9}$$
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$\frac{7}{9},\ -\frac{5}{9}$
