I. x2-72=x

    II. y2=64

  • If x>y
  • If x≥y
  • If x
  • If x≤y
  • If x=y or the relationship cannot be established.
  • Explanation:

    Solution,

     I. x2-72=x

    x2-x-72=0

    x2-9x+8x-72=0

    x(x-9)+8(x-9)=0

    (x-9)(x+8)=0

    x=9, -8

    II. y2=64

    y= ±8

    ∴ x≥y

     

     


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 I. x2-72=x II. y2=64
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