Question is included in this file. Thanks for helping!
Suppose a quadratic polynomial be $f(x)=ax^2+bx+c$.
Then we know that
$f(-4)=-22,$
$f(-1)=2,$ and
$f(2)=-1.$
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?
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