Hi

2- 4/x^2 = -2/x  |Multiplying @ term by x^2 so as all denominators = 1

 2x^2 - 4 = -2x

 2x^2 + 2x - 4 = 0

factoring

(2x -2)(x+2) = 0 Note:SUM of the inner product(-2x) and the outer product(4x) = 2x

(2x -2)=0

    x = 1

(x+2) = 0

    x = -2 

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