Maths-
General
Easy

Question

If square root of 19 minus 4 square root of x end root equals square root of 12 minus square root of 7 comma then x =

  1. 84    
  2. 28    
  3. 21    
  4. 14    

The correct answer is: 21


    On squaring we get 19 minus 4 square root of x equals 19 minus 2 square root of 84
    Þx = 21

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