# Help! Rotate the axis to eliminate the xy-term in the equation then write the equation ins standard form. #x^2-4xy+4y^2+5sqrt(5)y+1=0# Help!?

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This is different from the other equations; this is the correct one and has not been solved yet.

This is different from the other equations; this is the correct one and has not been solved yet.

##### 1 Answer

Dec 20, 2016

#### Explanation:

Rotating the coordinate system around the origin by an angle

and substituting we have in the conic now in the coordinates

the coefficient of