## Elementary Algebra

$(3x-2)(3x+2)$
The given binomial can be written as: $=(3x)^2-2^2$ Note that the binomial above is a difference of two squares. RECALL: $a^2-b^2=(a-b)(a+b)$ Factor the difference of two squares using the formula above where $a=3x$ and $b=2$ to obtain: $=(3x-2)(3x+2)$