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Use Rotation of Axes Formulas
- x2+2xy+y28x+8y=0;θ=45x ^ { 2 } + 2 x y + y ^ { 2 } - 8 x + 8 y = 0 ; \quad \theta = 45 ^ { \circ }

Question 39

Multiple Choice

Use Rotation of Axes Formulas
- x2+2xy+y28x+8y=0;θ=45x ^ { 2 } + 2 x y + y ^ { 2 } - 8 x + 8 y = 0 ; \quad \theta = 45 ^ { \circ }


A) x2=42yx ^ { \prime 2 } = - 4 \sqrt { 2 } y ^ { \prime }
B) 3x242xy+y2=03 x ^ { \prime 2 } - 4 \sqrt { 2 } x ^ { \prime } y ^ { \prime } + y ^ { \prime 2 } = 0
C) x2=42y2x ^ { \prime 2 } = - 4 \sqrt { 2 } y ^ { \prime 2 }
D) 2x22xy+2y2=02 x ^ { \prime 2 } - \sqrt { 2 } x ^ { \prime } y ^ { \prime } + 2 y ^ { \prime 2 } = 0

Correct Answer:

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