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Q.

When the origin is shifted to a suitable point, the equation 2x2 + y2 - 4x+4y=0 transformed as 2X2 + Y2 - 8X + 8Y + 18=0. The point to which origin was shifted is

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a

(1,2)

b

(1,-2)

c

(-1,2)

d

(-1,-2)

answer is C.

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Detailed Solution

Sub x=X+h,y=Y+ksubtute  in 2x2+y2-4x+4y=0

compare second equation 

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