FauxFlawed
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  • 04-07-2016
  • Mathematics
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N Squared - N = 90
N =?

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texaschic101
texaschic101 texaschic101
  • 04-07-2016
n^2 - n = 90
n^2 - n - 90 = 0
(n - 10)(n + 9) = 0

n - 10 = 0
n = 10

n + 9 = 0
n = -9

answer is : n = 10 and n = -9
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