1.

The coordinates of the point where origin is shifted is (-1,2) so that the equation`2x^(2)+y^(2)-4x+4y=0` become?A. `X^(2)+2Y^(2)=6`B. `2X^(2)+y^(2)=6`C. `2X^(2)+Y^(2)=4`D. `X^(2)+2Y^(2)=4`

Answer» Correct Answer - B
Substituting `x=X+1,y=Y-2` in the equation
`2x^(2)+y^(2)-4x+4y=-0`, we get
`2(X+1)^(2)+(Y-2)^(2)-4(X+1)+4(Y-2)=0`
`rArr 2X^(2)+Y^(2)-6=0rArr2X^(2)+Y^(2)=6`


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