Graph the conic section 9x^2 + 25y^2 = 225

This can be done as follows:
We see that this is the standard formula for an ellipse centred at origin.
Letting y=0, we solve for x=±5  (on the x-axis)
Letting x=0, we solve for y=±3  (on the y-axis).

Thus the graph looks like the following attachment.

Photo math will give you the step by step answer : )