Determine the appropriate rotation formulas to use so that the new equation contains no xy-term.x2 + 4xy + y2 - 8 = 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: B
Mathematics
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