Which is the equation of a hyperbola with directrices at x = ±2 and foci at (4, 0) and (−4, 0)? x squared over 8 minus y squared over 8 equals 1
x squared over 8 minus y squared over 16 equals 1
y squared over 8 minus x squared over 8 equals 1
y squared over 16 minus x squared over 8 equals 1