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If the pair of lines $x^{2} + 2 xy + {ky}^{2} = 0$ are perpendicular then k =

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Correct option is C

If the equation ax2+2hxy+by2=0 represents a pair of perpendicular lines then a+b=0Hence,k=−1

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If the pair of lines x2+2xy+ky2=0are perpendicular then k =

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Ready to Test Your Skills?

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If the pair of lines $x^{2} + 2 xy + {ky}^{2} = 0$ are perpendicular then k =