5m Zen
X 2 2xy 2y 2 5
X 2 2xy 2y 2 5 pictures 5
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X 2
X 2 2xy 2y 2 5
x^2-2xy+2y^2-2x-3y+5u003d0
x 2 2y 2 2xy 2x 2y 5 0
f x 2 2y 2 2xy 5 2y
x 2 2xy 2y 2 2x 6y 5 0
x 2 2y 2 2xy 4y 5
x^2+2xy+2y^2u003d5
