Posted by Rick on .
Find the discriminant. Tell which conic section each graph will be.
4x^2 + 9y^2 +7x2y100=0
4x^2+14xy+7x2y100=0

math 
Steve,
discriminant is B^2  4AC
first: 0  4*4*9 < 0 so ellipse
second: 196  4*4*0 > 0 so hyperbola