Find an Equation of the Tangent Line to the Curve $2 x ^ { 3 } + 2 y ^ { 3 } - 9 x y = 0$

Essay

Find an equation of the tangent line to the curve $2 x ^ { 3 } + 2 y ^ { 3 } - 9 x y = 0$ at the point (1, 2).