Sketch (x+y+3)^2 + (x-y-3)^2 = 0
The Attempt at a Solution
How?? I have totally no idea.
For that matter, think about [itex]a^2+b^2=0[/itex] before you expand the terms.Expand, simplify and complete the square. Now think about what the solutions are for [itex]a^2+b^2=0[/itex] for all real numbers a and b, and see if you can apply this idea to your problem.
Yes. Also note that in your original equation:Ok. So, (0,-3) is the only value? Is the graph just a dot?