Introductory Algebra for College Students (7th Edition)

$(x-5)(x+5)$
RECALL: A difference of two square can be factored using the formula $a^2-b^2=(a-b)(a+b)$ The given binomial can be written as: $=x^2-5^2$ The binomial above is a difference of two squares. Factor the difference of two squares using the formula above with $a=x$ and $b=5$ to obtain: $=(x-5)(x+5)$