Question

Срочно помогите пожалуйста!!!!!!!!!!!!!!!!

Answer 1

$frac{k}{k-m}+frac{m^2-k^2}{mk+m^2}:frac{m^2-2mk+k^2}{k^2}=$

$frac{k}{k-m}+frac{(m-k)(m+k)}{m(k+m)}:frac{(m-k)^2}{k^2}=$

$frac{k}{k-m}+frac{(m-k)(m+k)}{m(k+m)} cdot frac{k^2}{(m-k)^2}=$

$frac{k}{k-m}+frac{1}{m} cdot frac{k^2}{m-k}=$

$frac{k}{k-m}-frac{k^2}{m(k-m)}=$

$frac{km}{m(k-m)}-frac{k^2}{m(k-m)}=$

$frac{km-k^2}{m(k-m)}=$

$frac{-k(k-m)}{m(k-m)}=- frac{k}{m}$