Question

СССРРРЧЧННООО!!!!!! ДАЮ 100БАЛОВ!!!!!!!!!!!!!

Answer 1

Ответ:

Объяснение:

((5mn - m)/(4m + n)) *((16m^2 - n^2) /(5n - 1)) =

= (m(5n - 1) * (4m +n)(4m-n))/(4m + n)(5n - 1)) = m(4m - n)

при  m = 1/4  ; n = - 3

m(4m - n) = 1/4 * ( 4 * 1/4 -(-3) = 1/4 *(1 + 3) = 1/4 * 4 = 1

Answer 2

Ответ:

1

Объяснение:

(5mn - m)/(4m + n) * (16m² - n²)/(5n - 1) =

m(5n - 1)/(4m + n) * (4m-n)(4m+n)/(5n - 1) =

m/1 * (4m - n)/1 = m(4m - n)/1 = m(4m - n) =

4m² - mn

m = 1/4; n = -3

4m² - mn = 4 * (1/4)² - 1/4 * (-3) = 4 * 1/16 + 3/4 = 4/16 + 3/4 = 1/4 + 3/4 = 4/4 = 1