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The difference between two real numbers is 6 Find the minimum value of their product

解答 0

  • eric
    2020-12-03 17:37:34
    Let x, x+6 be the two numbers
  • eric
    2020-12-03 17:38:42
    Then the product=x(x+6)=x^2+6x
  • eric
    2020-12-03 17:39:29
    By completing square, we get (x+3)^2-9
  • eric
    2020-12-03 17:39:46
    So the minimum is -9
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