A curve has the equation x2+4xy−x+y2=35x^2 + 4xy - x + y^2 = 35x2+4xy−x+y2=35:
Find an expression for dydx\displaystyle \frac{dy}{dx}dxdy
Find an equation for the tangent to the curve at the point P(2,3)P(2, 3)P(2,3)
