Your question is not at all clear. You

**could** "sketch" the graph by calculating several points: if x= 0,

so y= 0 or -1/2.

and

are points on the graph. Taking y= 0, we get, in exactly the same way,

which we had before,

. Get enough points that way and you can sketch the graph.

But I suspect that you are intended to

**complete the square** to see what kind of figure this is:

If you divide through by 2 you get

. Presumably you know that

. Comparing that to

, they match if a= 1/4 and we can make this a "perfect square by adding

. Doing that for both x and y,

or

. What kind of figure is that?