If x and y are integers such that x^2= 2y and xy = 256, then x – y = ? Options: A) -30 B) -24 C) -5 D) 5 E) 20
here x and y are integers .   x^2=2y,xy =256.   substitute (x^2)/2=y in xy =&gt; x^3=256*2=&gt;x^3=512.   here x^3 is positive ,   x is also positive.   x=8 then y=32.   x-y=-24   so option -24 is correct
<result>B</result>
If x and y are integers such that x^2= 2y and xy = 256, then x – y = ?