Factorize each of the following expression:

Question:

Factorize each of the following expression:

$a^{4}-\frac{1}{b^{4}}$

Solution:

$a^{4}-1 / b^{4}$

= (a2)- 1/(b2)2

= a2- 1/b2a2 + 1/b2

= a - 1/ba + 1/ba2 + 1/b2

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