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OpenStudy (anonymous):
The equation of a parabola on an XY–plane is 3x2 + 2xy + 3y2 − 4x + 5y = 0. By what angle must the coordinate axes be rotated to eliminate the xy term in the equation? 30° 45° 60° 90°
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OpenStudy (anonymous):
3x^2+2xy+3y^2-4x+5y=0
OpenStudy (anonymous):
and its a even harder question
OpenStudy (anonymous):
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