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zorro

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## Homework Statement

Reduce the given ellipse in standard form and find its centre and eccentricity.

4(x-2y+1)

^{2}+ 9(2x+y+2)

^{2}= 25

## Homework Equations

Rotation of axes

x=Xcosθ - Ysinθ

y=Xsinθ + Ycosθ