Determine the appropriate rotation formulas to use so that the new equation contains no xy-term.3x2 + 5xy + 3y2 - 8x + 8y = 0
A. x = -y' and y = x'
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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