What is the expression in factored form?

25x^2 - 49

25x^2 - 49 = (5x-7) (5x+7)

Step-by-step explanation:

Given the expression is 25x^2 - 49.

We can compare the given problem with "Difference of square formula" i. e. a^2 - b^2 = (a-b) (a+b).

We have 25x^2 - 49.

25x^2 - 49 = (5x) ^2 - (7) ^2

25x^2 - 49 = (5x-7) (5x+7)

Hence, the factored form is 25x^2 - 49 = (5x-7) (5x+7).