5m Zen
X2 y2 x
X2 y2 x pictures 5
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X2 y2
X2 y2 x
x2+y2u003dx graph
x2 y2 x 3y 2 0
x2 y2 u003d( x y 2
x2+y2u003d(x+y)2-2xy
x2 y2 x 2y 3 0
x2 y2 x 2y
x2 y2 x
x2 y2 x y 2xy
x2 y2 x dx xydy 0
x2 y2 x y
