If x and y are integers such that x^2= 2y and xy = 32, then x – y = ? Answers:
A) -30
B) -20
C) -5
D) -4
E) 20
here x and y are integers .   x^2=2y,xy =32.   substitute (x^2)/2=y in xy =&gt; x^3=32*2=&gt;x^3=64.   here X3 is positive ,   X is also positive.   x=4 then y=8.   X-y=-4   so option -4 is correct
<result>D</result>
If x and y are integers such that x^2= 2y and xy = 32, then x – y = ?