SOLUTION: Find a quadratic function with the roots 1 and 3. Don't have much experience with these. Any help is appreciated!

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Question 1073998: Find a quadratic function with the roots 1 and 3.
Don't have much experience with these. Any help is appreciated!
Found 2 solutions by josgarithmetic, addingup:
Answer by josgarithmetic(39613) About Me  (Show Source):
Answer by addingup(3677) About Me  (Show Source):
You can put this solution on YOUR website!
Let f(x) be the function where 1 and 3 are the roots. Then, the factors are (x-1) and (x-3)
f(x) = (x-1)(x-3)
Now FOIL to open the brackets (First Outer Inner Last) and you get:
f(x) = x^2-3x-1x+3 = x^2-4x+3
:
John