Let K {\displaystyle {}K} be a field. The image of the curve defined by
is called semicubical parabola. Show that a point ( x , y ) ∈ K 2 {\displaystyle {}(x,y)\in K^{2}} belongs to this image if and only if it satisfies the equation x 3 = y 2 {\displaystyle {}x^{3}=y^{2}} .