Hi. Can you tell me what to do next.

I got that dy/dx=-72x/50y

Solve the equation explicitly foryand differentiate to getdy/dxin terms ofx.(Consider only the first and second quadrants for this part.)

36x2 + 25y2 = 900

I think next it would be

$\displaystyle 25y^2=900-36x^2$

then square root everything and

$\displaystyle 5y=300-6x$

and

$\displaystyle y=60-6/5x$

what's next? did i do something wrong?

thanks