$\{\begin{array}{l}\Delta >0{}^{\text{(1)}}\\ x_1\cdot x_2>0{}^{\text{(2)}}\\ x_1+x_2>0{}^{\text{(3)}}\end{array}$

$\left(1\right)\Delta >0$

${\left(m-3\right)}^2-4\cdot 1\cdot m^2>0$

$m^2-6m+9-4m^2>0$