Question

Factorise the following :-
x^4 + 1/x^4 + 1

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ITS URGENT!!!

Answer 1

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Answer 2

(x^2)^2 + (1/x^2)^2 + 1

(x^2 + 1/x^2)^ 2 -1

because it's x^4 + 1/x^4 + 2× x^2 × 1/x^2 -1

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

SO (x^2 + 1/x^2 + 1) (x^2 + 1/x^2 -1)