Question

Answer the following questions.
(a) Find the product using suitable identity.
(a + 3) (a - 3) (a? +9)​

Answer 1

Answer:

(a^2-b^2)

Step-by-step explanation:

= (a+b)(a-b)

Answer 2

Answer:

a² - 9

Step-by-step explanation:

using identity : [a+b][a-b] = a² - b²

so ,

[ a+3 ] [a-3 ] = a² - [ 3 ]²

                   = a²- 9²