Show that the following limit does not exist: lim (x,y)→(0,0) x 2+2xy+y 2 x2+y 2 . i need help with calculas question i typed it as best i could

 Show that the following limit does not exist: lim (x,y)→(0,0) x 2+2xy+y 2 x2+y 2 . i need help with calculas question i typed it as best i could