(m- (12m-4 ) : ( 4m - 40m) = m-2)
( m+8 ) ( m+8) 4m)
1)m - (12m - 4) = m^2 + 8m - 12m + 4 = m^2 - 4m + 4 = (m-2)^2
m+8 m+8 m+8 m+8
2)4m - 40m = 4m^2 + 32m - 40m = 4m^2 - 8m = 4m(m-2)
m+8 m+8 m+8 m+8
3) (m-2)^2 : 4m(m-2) = (m-2)^2(m+8) = m-2
m+8 m+8 (m+8)(m-2)4m 4m
При m не равном 2 и -8 и 0