Maths-
General
Easy

Question

If one of the lines in the pair of stright lines given by 4 x to the power of 2 end exponent plus 6 x y plus k y to the power of 2 end exponent equals 0 bisects the angle between the coordinate axes, then kelement of

  1. {-2,-10}    
  2. {-2,10}    
  3. {-10,2}    
  4. {2,10}    

The correct answer is: {-10,2}


    STEP BY STEP SOLUTION
    If one of the lines in the pair of stright lines given by 4 x to the power of 2 end exponent plus 6 x y plus k y to the power of 2 end exponent equals 0 bisects the angle between the coordinate axes.

    Then K element of
    left parenthesis a plus b right parenthesis to the power of 2 end exponent equals 4 h to the power of 2 end exponent
    K element of open curly brackets negative 10 comma 2 close curly brackets

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