Question

If x - 1/x = 5, then is x^2 -1/x^2 equal to?
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Answer 1

Answer:

23

Step-by-step explanation:

(x-1/x)^2=(5)^2

x^2-1/x^2+2x*1/x=25

x^2-1/x^2=25-2

x^2-1/x^2=23