1. ## equation two varables

Hi,
Equation - two variables
I have an equation ax^2 + by^2 + cxy > 0.
What are the constraints for x and y that they satisfy the inequality ?
Thanks for any response

2. ## Re: equation two varables

could consider c = 2 sqrt ab for that would make the inequality true

3. ## Re: equation two varables

Originally Posted by andrews
Hi,
Equation - two variables
I have an equation ax^2 + by^2 + cxy > 0.
What are the constraints for x and y that they satisfy the inequality ?
Thanks for any response
Hint: The RHS represents an ellipse rotated about the origin. Can you put it in this form?

-Dan