Question

(5m-1)(4m+7)-20m
ответьте срочно

Answer 1

Объяснение:

(5m - 1)(4m + 7) - 20m =

(5m*4m + 5m*7 - 1*4m - 1*7) - 20m =

(20m² + 35m - 4m - 7) - 20m =

20m² + 31m - 7 - 20m = 20m² + 11m - 7