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A cruve is respresented by C=21x^(2)-6xy...

A cruve is respresented by `C=21x^(2)-6xy+29y^(2)+6x-58y-151=0`
The lengths of axes are

A

`6,2 sqrt(6)`

B

`5,2sqrt(5)`

C

`4,4sqrt(5)`

D

none of these

Text Solution

Verified by Experts

`24x^(2)-6xy+29y+6x-58y-151=0`
`2(x-3y+3)^(2)+2(3x+y-1)^(2)=180`
or `((x-3y+3)^(2))/(60)+((3x+y-1)^(2))/(90)=1`
or `((x-3y+3)/(sqrt(1+3^(2))sqrt(6)))^(2)+((3x+y-1)/(3sqrt(1+3^(2))))=1`
Thus, C is an ellipse whose lengths of axes are `6,2sqrt(6)`.
The minor and the major axes are `x-3y+3=0 and 3x+y-1=0`, respectively.
Their point of intersection gives the center of the center of the conic. Therefore, Center `-=(o,1)`
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