aaco3399 aaco3399
  • 19-06-2018
  • Mathematics
contestada

When the sum of 7 and twice a positive number is subtracted from the square of the​ number, 0 results. find the number?

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ricopicante681
ricopicante681 ricopicante681
  • 25-06-2018
x^2 - (7 + 2x) = 0
x^2 - 2x - 7 = 0
Solve this using the quadratic equation, only the positive solution is wanted
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