I. x2+13x+42=0

    II. y2+19y+90=0

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

    I. x2+13x+42=0

    x2+6x+7x+42=0

    x(x+6)+7(x+6)=0

    (x+6)(x+7)=0

    x=-6,-7

    II. y2+19y+90=0

    (y+9)(y+10)=0

    y=-9,-10

    ∴ x>y


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 I. x2+13x+42=0 II. y2+19y+90=0
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