AMC 10 Step by Step
2006 AMC 10AProblem 11P11-15~1 minPrint

Which of the following describes the graph of the equation (x+y)2=x2+y2(x+y)^2=x^2+y^2 ?

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Problem © Mathematical Association of America (MAA), American Mathematics Competitions. Reproduced for non-commercial educational use. Solution and commentary are original to this site.