Question

Сократить!!!!

2 mn - 6m^2
____________
12m^2n - 4mn^2

Answer 1

$\frac{2mn-6 m^{2} }{12m^{2}n-4mn^{2}} = \frac{2m(n-3m)}{4mn(3m-n)} = - \frac{1}{2n}$