Question

17.
What should be subtracted from 3m^2 - 4m^3 + m - 9 to obtain 4m^2 - 2m +
3m^3 - 12?
(A) - 7m^2 + 7m +3m - 3
(B) - m^2 - 7m^3 - 3m + 3
(C) -m^2- 7m^3 + 3m - 3
(D) - 7m² + 7m^3 - 3m + 3
(E) None of these
please answer with step by step explanation​

Answer 1

Answer:

al

Step-by-step explanation:

Let the number that should be subtracted from 3m² - 4m³ + m - 9 to obtain 4m² - 2m + 3m³ - 12 be x .

3m² - 4m³ + m - 9 - x = 4m² - 2m + 3m³ - 12

x = 3m² - 4m³ + m - 9 - 4m² + 2m - 3m³ + 12

x = 7m² - 7m³ + 3m + 3