Simplify each each expression. Multiply the two polynomials and write your answer in standard form. (9a-2)(9a+2)
First, use the distributive property to multiply the two polynomials:
(9a - 2)(9a + 2) = 9a * 9a + 9a * 2 - 2 * 9a - 2 * 2
= 81a^2 + 18a - 18a - 4
= 81a^2 - 4
Therefore, the simplified expression is 81a^2 - 4.