What are the factors of 16a^2 − 25b^2?

The expression 16a^2 − 25b^2 can be factored as a difference of squares:

16a^2 − 25b^2 = (4a)^2 - (5b)^2 = (4a - 5b)(4a + 5b).

Therefore, the factors of 16a^2 − 25b^2 are (4a - 5b) and (4a + 5b).