Find the discriminant. Tell which conic section each graph will be.
4x^2 + 9y^2 +7x-2y-100=0
4x^2+14xy+7x-2y-100=0
discriminant is B^2 - 4AC
first: 0 - 4*4*9 < 0 so ellipse
second: 196 - 4*4*0 > 0 so hyperbola
4x^2 + 9y^2 +7x-2y-100=0
4x^2+14xy+7x-2y-100=0
first: 0 - 4*4*9 < 0 so ellipse
second: 196 - 4*4*0 > 0 so hyperbola