Question

Factorize the following:
a^4-1​

Answer 1

$\huge \bf \: question$

factorise the following :

${a}^{4} - 1$

How to solve ?

=> by using the identity

a^2 - b^2 =( a+b)( a-b )

Answer :-

${a}^{4} - 1$

$= ( {a}^{2} - 1)( {a}^{2} + 1)$

$= (a - 1)(a + 1)( {a}^{2} + 1)$

Answer 2

(a²)²-(1)²

Using identity:

a²-b²=(a+b)(a-b)

(a²-1)(a²+1)

hope it's helpful to you ☺️....

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