1.

Find the product of[x+1/x-1][x^2+1/x^2+x+1/x]

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ANSWER:

EXPLANATION:

(a+b)(a-b) =a²- b² in all CASES [x+1/x][x-1/x][x²+1/x²][x⁴+1/x⁴] = [x²- 1/x²][x²+1/x²][x⁴+1/x⁴] =[(x²)²- (1/x²)²][x⁴+1/x⁴]

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