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20 12 how to fill in the blanks of science mathematics in Shaanxi college entrance examination 13 (with questions)
The rectangular coordinate system established with the vault as the origin is the vertical downward Y axis, and the parabolic equation is that the coordinate of the intersection point between the water surface and the wall on the map is (2, -2), so the parabolic equation is y=? After the water level of X 2 drops, the coordinate intersecting with the wall is (? X, 3), as in the equation, the solution is x=2√6.