Question

find the product using suitable identity​

Answer 1

Answer:

(a+3) (a-3) (a²+9)

*(a+b) (a-b) = a²-b²

(a²-3²) (a²+9)

(a²-9) (a²+9)

*(a+b) (a-b) = a²-b²

( a²)² - 9²

(a⁴-81) = 0

a⁴= 81

a² = √81

a²=9

a = √9

a = 3

Step-by-step explanation:

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