Near What Points Can the Equation 2x² + Xy

Multiple Choice

Near what points can the equation 2x² + xy + y² = 7 not be solved for y as a function of x?

A) (2, 1) and (-2, -1)
B) (2, -1) and (-2, 1)
C) (2, 1) , (-2, -1) , (2, -1) , and (-2, 1)
D) (2, 1) and (2, -1)
E) (2, -1) , (-2, 1) , and (0, 0)