AaryamanKumaridn
Answered

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The difference between two integers is 6. The sum of their sqaures is a minimum. Find the 2 integers.
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Sagot :

Mhanifaidn

Answer:

  • 3 and - 3

Step-by-step explanation:

Let the numbers are x and y.

Their difference is:

  • x - y = 6

Sum of their squares:

  • S = x² + y²

Substitute y = x - 6 into sum equation:

  • S = x² + (x - 6)² =
  •      x² + x² - 12x + 36 =
  •      2x² - 12x + 36

We observe this is a quadratic expression. It has minimum value at vertex, which is when x = -b/2a or:

  • x = - (-12/2*2) = 3

Then the value of y is:

  • y = x - 6 = 3 - 6 = - 3

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