Use the equation 2x210x4y86y4=7x9\displaystyle -{2}{x}^{{2}}-{10}{x}^{{4}}{y}^{{8}}-{6}{y}^{{4}}=-{7}{x}^{{9}} to find dydx\displaystyle \frac{{{\left.{d}{y}\right.}}}{{{\left.{d}{x}\right.}}}.
dydx=\displaystyle \frac{{{\left.{d}{y}\right.}}}{{{\left.{d}{x}\right.}}}=