7 The equation of a curve is
$$3 x ^ { 2 } - 4 x y + 2 y ^ { 2 } - 6 = 0$$
- Show that \(\frac { \mathrm { d } y } { \mathrm {~d} x } = \frac { 3 x - 2 y } { 2 x - 2 y }\).
- Find the coordinates of each of the points on the curve where the tangent is parallel to the \(x\)-axis.