Which equations represent hyperbolas?
A) 2x2 + 16x + 2y2 + 14y − 9 = 0
B) 2x2 + 4x − 5y2 − 10y + 57 = 0
C) -x2 + 5x − 7y2 + 2y − 81 = 0 d) x − 2y2 + 4y + 15 = 0
E ) -x2 + 12x + 3y2 + 7y + 11 = 0