Question

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

Answer 1

`(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)`