Question:
If $A=\left(\begin{array}{cc}1 & 2 \\ 4 & -3\end{array}\right)$ and $f(x)=2 x^{2}-4 x+5$ then $f(A)=$ ?
A. $\left(\begin{array}{cc}19 & -32 \\ -16 & 51\end{array}\right)$
B. $\left(\begin{array}{cc}19 & -16 \\ -32 & 51\end{array}\right)$
c. $\left(\begin{array}{cc}19 & -11 \\ -27 & 51\end{array}\right)$
D. None of these
Solution:
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