Determine the appropriate rotation formulas to use so that the new equation contains no xy-term. 4x 2

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Determine the appropriate rotation formulas to use so that the new equation contains no xy-term. 

4x2 – 4xy + y2 - 8√5x – 16√5y = 0

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Precalculus

ISBN: 978-0321716835

9th edition

Authors: Michael Sullivan

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