Use implicit differentiation where LaTeX:  \displaystyle y is a function of LaTeX:  \displaystyle x to find the derivative of LaTeX:  \displaystyle 2 \sqrt{5} x^{3} \sqrt{y} - 6 e^{x} \log{\left(y \right)}=-3

Taking the derivative of both sides using implicit differentiation gives: LaTeX:   \frac{\sqrt{5} x^{3} y'}{\sqrt{y}} + 6 \sqrt{5} x^{2} \sqrt{y} - 6 e^{x} \log{\left(y \right)} - \frac{6 y' e^{x}}{y} = 0  Solving for LaTeX:  \displaystyle y' gives LaTeX:  \displaystyle y' = \frac{6 \left(- \sqrt{5} x^{2} y^{2} + y^{\frac{3}{2}} e^{x} \log{\left(y \right)}\right)}{\sqrt{5} x^{3} y - 6 \sqrt{y} e^{x}}