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 of the tangent to the curve at the point P(2,3)P(2, 3)P(2,3).