Question

упростите выражение (m-4)^2+m(8-5m)-9

Answer 1

Ответ:

m^2+16-5m^2-9 = -4m^2+7.

Answer 2

Объяснение:

(m - 4)² + m(8 - 5m) - 9 =

(m² - 8m + 16) + (8m - 5m²) - 9 =

m² - 8m + 16 + 8m - 5m² - 9 =

(m² - 5m²) + (-8m + 8m) + (16 - 9) =

-4m² + 0 + 7 = -4m² + 7