Maths-
General
Easy

Question

The distance between the parallel lines 9 x to the power of 2 end exponent minus 6 x y plus y to the power of 2 end exponent plus 18 x minus 6 y plus 8 equals 0 text  is end text

  1. fraction numerator 1 over denominator square root of 10 end fraction    
  2. fraction numerator 2 over denominator square root of 10 end fraction    
  3. fraction numerator 4 over denominator square root of 10 end fraction    
  4. square root of 10    

The correct answer is: fraction numerator 2 over denominator square root of 10 end fraction


    2 square root of fraction numerator g to the power of 2 end exponent minus a c over denominator a left parenthesis a plus b right parenthesis end fraction end root

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