Determine the appropriate rotation formulas to use so that the new equation contains no xy-term.5x2 + 4
xy + y2 - 36 = 0
A. x = 
(
x' - y') and y = 
(x' + 
y')
B. x = 
(x' - 
y') and y = 
(
x' + y')
C. x = 
(
x' + y') and y = 
(x' - 
y')
D. x = 
(
x' - y') and y = 
(x' + 
y')
Answer: D
Mathematics
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