Question 1023732
X^4 + 1/X^4 – 3 by completing the square.
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check the book's answer:
(x^2+1/x^2)^2 +1)(x^2+1/x^2)^2 -1) = (x^2 + 1/x^2)^2 - 1
= x^4 + 2 + 1/x^4 - 1
= x^4 + 1/x^4 + 1  ---> book is wrong.
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