SOLUTION: The sum of a number and its square is 156 . Find the number

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Question 794799: The sum of a number and its square is 156 . Find the number
Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
A number = x
The sum of a number and its square is 156
x + x^2 = 156
x^2 + x - 156 = 0
(x - 12)(x + 13) = 0
x + 13 = 0
x = -13 (no answer as x <0)
x - 12 = 0
x = 12
The number is 12.
Hope this helps.
:-)