Question

выполните вычитание m^2/m^2-9 - m/m+3

Answer 1

$\frac{m^2}{m^2-9} -\frac{m}{m+3} =\frac{m^2}{(m-3)(m+3)} -\frac{m}{m+3} =\\ \\ \frac{m^2-m(m-3)}{(m-3)(m+3)} =\frac{3m}{m^2-9}$