Question

упростите!!!!!! !!!!!

Answer 1

$frac{10+4(m-2)}{2(m-2)*(m+n)}\ \frac{2(5+2(m-n))}{2(m-n)*(m+n)}\frac{5+2m-2n}{(m-n)*(m+n)}\\frac{5+2m-2n}{m^2-n^2}$