Question

verify (x+1/x)^2 - (x-1/x)^2 =4
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Answer 1

Answer:

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Answer 2

Answer:

(x+1/x)²- (x-1/x)²=4

(x²+1+2x/x²)-(x²+1-2x/x²)=4

x²+1+2x-x²-1+2x/x²=4

4x/x² =4

4/x =4

x=4/4=1

therefore, x=1