Factor Polynomial 9a^2-1

Factor polynomial 9a^2-1

 

Answer:

(3a + 1) (3a - 1)

Step-by-step explanation:

9a² - 1 is a difference of two squares.

The difference of two squares is the product to sum and difference of two terms.

Pattern:

a² - b² = (a-b)(a+b)

Factor 9a² - 1:

(3a + 1) (3a - 1)