[Solution Library] Find the quadratic polynomial that best fits the four points (2,0),(3,-10),(5,-48), and (6,-76). You may want to use
Question: Find the quadratic polynomial that best fits the four points \((2,0),(3,-10),(5,-48)\), and \((6,-76)\). You may want to use
\[\left(\begin{array}{ccc} 4 & 16 & 74 \\ 16 & 74 & 376 \\ 74 & 376 & 2018 \end{array}\right)^{-1}=\left(\begin{array}{ccc} 221 / 10 & -62 / 5 & 3 / 2 \\ -62 / 5 & 649 / 90 & -8 / 9 \\ 3 / 2 & -8 / 9 & 1 / 9 \end{array}\right)\]The answer is \(2+5 x-3 x^{2}\).
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