જો \({\rm x} + \frac{1}{{\rm x}} = - 14 \) અને x < -1 હોય, તો \({{\rm x}^2} - \frac{1}{{{{\rm x}^2}}}\) નું મૂલ્ય શું હશે?

1
- 112√3
2
112√3
3
-140√2
4
140√2

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