## Elementary Geometry for College Students (7th Edition)

$4x^2-16 = (4)~(x+2)~(x-2)$
The general form of factoring the difference of two squares is as follows: $x^2-y^2 = (x+y)~(x-y)$ We can factor the expression by using the GCF and then factoring the difference of two squares: $4x^2-16 = (4)(x^2-4)$ $4x^2-16 = (4)~(x+2)~(x-2)$