Question

Find the product using suitable identity:(a+3)(a-3)(a^2+9)​

Answer 1

Step-by-step explanation:

(a+3)(a-3)(a^2+9)

(a^2-3^2)(a^2+9) <(a+b)(a-b)>

(a^2-9)(a^2+9)

[(a^2)^2]-9^2

a^4-81 (ans