Find dydx\frac{dy}{dx}dxdy by implicit differentiation for x2+y2=25x^2 + y^2 = 25x2+y2=25.
−xy-\frac{x}{y}−yx
xy\frac{x}{y}yx
−yx-\frac{y}{x}−xy
2x2y\frac{2x}{2y}2y2x