Question

factorise x^4-1
please ans write​

Answer 1

Answer:

(x + 1)(x - 1)(x² + 1)

Step-by-step explanation:

x⁴ - 1 = (x² - 1)(x² + 1)

*Identity—a² - b² = (a + b)(a - b)*

= (x + 1)(x - 1)(x² + 1)

*Identity—a² - b² = (a + b)(a - b)*

Hope it helps you:)

Answer 2

Step-by-step explanation:

x⁴-1

we can write x⁴ as (x²)² and 1 as 1²

=> (x²)²-1²

now, by using identity

a²-b² = (a+b)(a-b)

:• (x²)²-1

=> (x²+1)(x²-1)

hope it helps............:)