5m Zen
X 2y xy 3 2
X 2y xy 3 2 pictures 5
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X 2y
X 2y xy 3 2
3 x 2y 2 xy 2 4
x 2 2y 3 u003d- 1 and xy 3 3 substitution method
3 u221A xy 2 x 2y
xy 7 /( x 2y 3 2
x 3 y 3 x 2y xy 2
xy 2 dx x 2y 3 dy 0
x 2 2y 3 u003d- 1 and xy 3 3
x 3 x 2y xy 2 y 3 81
2x 3 x 2y xy 3 2
x 2y xy 3 2
