## Introductory Algebra for College Students (7th Edition)

$(2x + 1)(2x - 1)$
To factor the difference of two squares, we use the formula: $$A^2 - B^2 = (A + B)(A - B)$$ For this binomial, we take the square root of the leading coefficient to get $A = 2$ and the square root of the constant to get $B = 1$. So we now plug these two values into the formula for factoring the binomial: $(2x + 1)(2x - 1)$