If x and y are integers such that x^2+2x+2y+3=2x^2+3x+y+1, we can deduce that y is
Choose one:
A) not an even B) an even C) a perfect square D) an odd E) a prime
x^2 + 2x + 2y + 3 = 2x^2 + 3x + y + 1   y = x^2 + x - 2   y = (x+2)(x-1) (Note that one factor is even and one factor is odd.)   Then y must be even.   The answer is an even.
<result>B</result>
If x and y are integers such that x^2+2x+2y+3=2x^2+3x+y+1, we can deduce that y is