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MHT CET2011MathematicsPair of Lines

If one of the lines of the pair a x²+2 h x y+b y²=0 bisects the angle between positive direction of the axes, then a, b and h satisfy the relation

Options

  1. Aa+b=2|h|
  2. Ba+b=-2 h
  3. Ca-b=2|h|
  4. D(a-b)²=4 h²

Correct answer

B. a+b=-2 h

Step-by-step solution

y=x , should satisfy a x²+2 h x y+b y²=0 a+b=-2 h

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