A curve has the equation 3x2+xy−2x+2y2=113x^2 + xy - 2x + 2y^2 = 113x2+xy−2x+2y2=11:
Find an expression for dydx\displaystyle \frac{dy}{dx}dxdy
Find an equation for the tangent to the curve at the point P(1,2)P(1, 2)P(1,2)