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If $2 x^{2} + 3 xy + {ky}^{2} - 5 x + 5 y + 7 = 0$ represents a pair of perpendicular lines, $k =$

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Correct option is C

If the equation ax2+2hxy+by2=0represents a pair of perpendicular lines then a+b=0For the equation 2x2+3xy+ky2−5x+5y+7=0k+2=0k=−2Therefore, k=−2

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If 2x2+3xy+ky2−5x+5y+7=0 represents a pair of perpendicular lines, k=

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Ready to Test Your Skills?

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If $2 x^{2} + 3 xy + {ky}^{2} - 5 x + 5 y + 7 = 0$ represents a pair of perpendicular lines, $k =$