Question

Factorize 9) a^4 -1​

Answer 1

Answer:

a⁴ - 1

(a²)² - (1)²

(a² - 1)(a² + 1)

[(a)² - (1)²](a² + 1)

(a + 1)(a - 1)(a² + 1)

Step-by-step explanation:

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Answer 2

Answer:

a⁴ - 1

(a²)² - (1)²

(a² + 1)(a² - 1)

(a² + 1){(a)² - (1)²}

(a² + 1)(a + 1)(a - 1)