How do you factor the expression 25x^2 - 4?

1 Answer
Jan 31, 2016

(5x + 2)(5x - 2) or (5x - 2)(5x + 2)
Both are correct answers :)

Explanation:

Since a^2 - b^2 = (a + b)(a - b) or (a + b)(a - b)
(Factoring Difference of Two Squares)

We can do this by "Trial and Error Method".

25x^2 - 4

giving (5x + 2)(5x - 2)
or (5x - 2)(5x + 2)