Which solution to the equation 1/x-1 = x-2/2x^2-2 is extraneous

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1

Which solution to the equation 1/x-1 = x-2/2x^2-2 is extraneous x = 1 and x = –4 neither x = 1 or

a. x = –4
b. x = 1
c. x = –4