If $$(\frac{x}{5})+(\frac{5}{x})=-2$$, then what is the value of $$x^3$$?
Given : $$(\frac{x}{5})+(\frac{5}{x})=-2$$
=> $$\frac{x^2+25}{5x}=-2$$
=> $$x^2+10x+25=0$$
=> $$(x+5)^2=0$$
=> $$x=-5$$
$$\therefore$$ $$x^3=(-5)^3=-125$$
=> Ans - (A)
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