Сократите дробь: В). m^2-n^2/mn+n^2 Д). z-1/a-az

Question

Сократите дробь:
В). m^2-n^2/mn+n^2
Д). z-1/a-az

Answer 1

В). m^2 - n^2/mn + n^2 = (m-n) (m+n)/n (m+n) = (m-n)/n

Д). z-1/a-az = z1/a(1-z)

Answer 2

В) = ((m-n)(m+n))/(n(m+n)) = (m-n)/n 
д) = (z-1)/(-a(z-1)) = - 1/a