Question

Factor each trinomial completely.
4x^2 - 25b^2 and x^2 - 81

Answer 1

Step-by-step explanation:

4x2 - 25b2

We can solve it by the squares so

(2x - 5b) (2x + 5b)

2) x2 - 81

The same case is here so

(x - 9) (x + 9)