1. The problem statement, all variables and given/known data Determine y'' when 5x^2 + 3y^2 = 4. 3. The attempt at a solution So I found the first derivative using the power rule and chain rule, 10x + 6yy' = 0 Which I then solved for y', y' = -10x/6y = -5x/3y Next I found the second derivative using quotient rule, y'' = (-15y + 15xy')/(3y)^2 This is the part where I am lost, since all the multiple choice answers involve no y' nor is there a x. I don't know how to get rid of the x and the y' in the equation. Any help will be appreciated as to simplifying the equation even further and as to how.