For what value of \( \lambda \) does the equation \( 12 x^{2}-10 x ...

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For what value of \( \lambda \) does the equation \( 12 x^{2}-10 x y+2 y^{2}+11 x-5 y+\lambda=0 \) represent a pair of straight lines ? Find their
\( \mathrm{P} \) equations,

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