517 x 517 + 483 x 483=?	Select.
A) 79698  B) 80578  C) 500578  D) 81268  E) None of them
=(517)^2 + (483)^2   =(500+17)^2 + (500-17)^2   =2[(500)^2+(17)^2]   =2[250000+289]   =2 x 250289 = 500578   Answer is 500578
<result>C</result>
517 x 517 + 483 x 483=?