aaco3399 aaco3399

19-06-2018
Mathematics

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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

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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