Rewrite the equation for each ellipse or hyperbola in standard form. State whether the equation represents an ellipse or a hyperbola, and identify the center.
- (a) x2+4y2+4x-8y-8=0
- (b) x2-4y2-4x-24y-36=0
Identify the center and sketch the graph of the ellipse or hyperbola
- (a) (x-1)2 / 9 + (y-2)2 / 16 = 1
- (b) (x-2)2 / 25 + (y+3)2 / 4 = 1
- (c) (y+1)2 / 4 - x2 / 25 = 1
- (d) (x+1)2 / 4 - (y-3)2 / 9 = 1