The pair lines of homogeneous second-degree equation ax^2 + 2hxy + by ^2 = 0 are real and coincident, if: - IQ786

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The pair lines of homogeneous second-degree equation ax^2 + 2hxy + by ^2 = 0 are real and coincident, if:

The pair lines of homogeneous second-degree equation ax^2 + 2hxy + by ^2 = 0 are real and coincident, if:

h^2 < ab

h^2 >ab

h^2 = ab

None of these

Explanation