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Question: Answered & Verified by Expert
If the equation $a x^{2}+h x y+b y^{2}=0$ represents a pair of coincident lines, then
MathematicsPair of LinesMHT CETMHT CET 2020 (13 Oct Shift 2)
Options:
  • A $h^{2}=2 a b$
  • B $h^{2}=4 a b$
  • C $h^{2}=8 a b$
  • D $h^{2}=a b$
Solution:
1081 Upvotes Verified Answer
The correct answer is: $h^{2}=4 a b$
This is by definition.

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