Answer:
(2m + 7) (2m - 7) are the factors.
Step-by-step explanation:
Hope it can help!
The factors are 2m + 7 and 2m - 7
Applying the difference of two squares pattern where
a^2 - b^2 = (a + b)(a - b)
4m^2 - 49 = (2m + 7)(2m - 7)
