If x and y are different integers and x^2 = xy, which of the following must be true ?
I. x = 0
II. y = 0
III. x = -y	Select.
A) I only	B) II only	C) III only	D) I and III only	E) I, II, and III
Re-arrange equation: x^2 - xy = 0 =&gt; x*(x-y) = 0   Therefore, either x=0 or x=y. We know that x and y are different, so x must be equal to 0.   I onlyNSWER:I only
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If x and y are different integers and x^2 = xy, which of the following must be true ?
I. x = 0
II. y = 0
III. x = -y