$\displaystyle m= \left(-\frac{1}{2} \right)$\displaystyle m= \left(-\frac{1}{2} \right)

$\displaystyle m=\frac{1}{4}$\displaystyle m=\frac{1}{4}

$\displaystyle m= \frac{3}{2}$\displaystyle m= \frac{3}{2}

$m=2$m=2