Difference+of+Squares

Difference of Squares Difference of squares are when you have two perfect squares subtracting one from the other. Examples: (16x 2 - 9) (25X 2 - 121) (49x 2 - 4)

__**Only use this type of factoring if it is a binomial with two perfect squares**__

Let's Start with (16x 2 - 9)
 * 16x 2 ** is a square of __4x__ and **9** is a square of __3__

The answer would be (4x - 3)(4x + 3)
Another Example: (25x 2 - 121) So **25x 2 ** is a square of __5x__ and **121** a square of __11__ Like last time combine the square roots to make (5x - 11)( 5x + 11) for the answer.

With some problems you may need to factor out the GCF Such as (64x 2 - 16) = 4(16x - 4) See Greatest Common Factor (GCF) for details

[] This link is a factoring homework helper and can be used as a study game