
Please refer to link:
https://en.wikipedia.org/wiki/Conic_section#General_Cartesian_form
General Cartesian form of the equation is:
Ax2+Bxy+Cy2+Dx+Ey+F=0;
If discriminant is equal to zero, the equation represents a parabola.
B2−4AC=22−4×1×1=0.
Therefore it is a parabola.
Figure: parabola.