SOLUTION: Why are there usually two solutions in quadratic equations?

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Question 175732: Why are there usually two solutions in quadratic equations?

Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
The solution to a quadratic equation involves finding the square root of a function. Since a square root can be either positive or negative, you generally are going to have 2 solutions.
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that is the most obvious reason I can come up with.