Question

Factor the expression given below. Write each factor as a polynomial in

descending order.
4²-1

Answer 1

(2x - 1)(2x + 1)

Explanation:

4x² - 1 is a difference of squares and factors in general as

a² - b² = (a - b)(a + b) , then

4x² - 1

= (2x)² - 1²

= (2x - 1)(2x + 1)