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Prove that the aea of the triangle forme...

Prove that the aea of the triangle formed by `y=x+c` and the pair of lines `ax^(2)+2hxy=by^(2)=0` is `(e^(2)sqrt(h^(2)-ab))/(|a+b+2h|)` sq. units.

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The correct Answer is:
`(n^2sqrt(h^2-ab))/(|am^2-2hlm+bl^2|)` sq. units
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