Question

35 баллов!
сократите дробь (m-n)^2 (m+n)^2/m^4-n^4

Answer 1

${(m-n)^2(m+n)^2over m^4-n^4}={(m-n)^2(m+n)^2over (m^2-n^2)(m^2+n^2)}={(m-n)^2(m+n)^2over (m-n)(m+n)(m^2+n^2)}={m^2-n^2over m^2+n^2}$