nalla0five
nalla0five nalla0five
  • 22-06-2021
  • Mathematics
contestada

x^2+2x+7=21 the approximate value of the greatest solutoon to the equation, rounded to the nearest hundreth​

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sqdancefan
sqdancefan sqdancefan
  • 22-06-2021

9514 1404 393

Answer:

  x ≈ 2.87

Step-by-step explanation:

We  can subtract 6 to put the equation into a form easily solved.

  x^2 +2x +1 = 15

  (x +1)^2 = 15

  x +1 = √15 . . . . . for the greatest solution, we only need the positive root

  x = √15 -1 ≈ 2.87

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