If x^2 + 9/x^2 = 22, what is the value of x - 3/x Options
A) 36	B) 25	C) 9	D) 5	E) 4
To find : x-3/x. Let it be t.   =&gt; x-3/x = t   =&gt; (x^2 + 9/x^2) - 2*x*3/x = t^2 (Squaring both sides).   =&gt; (22) - 2*3= 
<gadget id="calculator">(22) - 2*3</gadget>
<output>16</output>
16=&gt; t^2 = 16. Thus t=4 or t=-4.   Answer 4
<result>E</result>
If x^2 + 9/x^2 = 22, what is the value of x - 3/x