If x and y are integers such that x^2= y and xy = 27, then x – y = ?
Choices
A) -30	B) -20	C) -6	D) 5	E) 20
here x and y are integers .   x^2=y xy =27.   substitute x^2=y in xy =&gt; x^3=27.   here X3 is positive ,   x is also positive.   x=3 then y=9.   x-y=-6   so option -6 is correct
<result>C</result>
If x and y are integers such that x^2= y and xy = 27, then x – y = ?