Assignment:
Write the equation in terms of a rotated x'y'-system using q, the angle of rotation. Write the equation involving x' and y' in standard form.
x2 + 2xy + y2 - 8x + 8y = 0; q = 45°
x'2 = -4√2y'2
x'2 = -4√2y'
3x'2 - 4√2x'y' + y'2 = 0
2x'2 - √2x'y' + 2y'2 = 0
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