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The equation ${ax}^{2} + 2 hxy + {by}^{2} + 2 gx + 2 fy + c = 0$ represents a pair of parallel lines then $\sqrt{ab} =$

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Correct option is A

The condition that the equation ax2+2hxy+by2+2gx+2fy+c=0 represents pair of h2=ab, and af2=bg2parallel lines is Hence, h=abTherefore ab=h

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The equation ax2+2hxy+by2+2gx+2fy+c=0 represents a pair of parallel lines then ab=

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Ready to Test Your Skills?

free study material

The equation ${ax}^{2} + 2 hxy + {by}^{2} + 2 gx + 2 fy + c = 0$ represents a pair of parallel lines then $\sqrt{ab} =$