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Suppose a quadratic polynomial be $f(x)=ax^2+bx+c$.
Then we know that
$f(-1)=2,$ and

Using $f(-4)=-22,$ we can deduct that $16a-4b+c=-22.$
Using $f(-1)=2,$ we can deduct that $a-b+c=2$
And finally, using $f(2)=-1,$ we can deduct that $4a+2b+c=-1.$


I have got a partial answer so far.


What do I do after I find a, b, and c?

 Jul 22, 2020

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 Aug 13, 2020

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