If x^2 + 9/x^2 = 7, what is the value of x - 3/x	Choose the correct choice from the following
A) 1	B) 25	C) 9	D) 5	E) 3
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; (7) - 2*3= 
<gadget id="calculator">(7) - 2*3</gadget>
<output>1</output>
1=&gt; t^2 = 1. Thus t=1 or t=-1.   1nswer 1
<result>A</result>
If x^2 + 9/x^2 = 7, what is the value of x - 3/x