Question

factorize using suitable identities
a4-81

please solve it's urgent​

Answer 1

• Answer :-

→ a⁴ - 81

→ (a²)² - (9)²

→ (a² + 9)(a² - 9)

→ (a² + 9)[(a)² - (3)²]

→ (a² + 9)(a + 3)(a - 3)

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