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If the lines ax^2+2hxy+by^2=0 be two si...

If the lines `ax^2+2hxy+by^2=0` be two sides of a parallelogram and the line lx+my=1 be one of its diagonal, show that the equation of the other diagonal is y (bl-hm)=x(am-hl).

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The correct Answer is:
`=2xx1/2|1/6xx2/9-1/9xx1/(12)|=1/(36) "sq units"`
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