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| 1. |
A = \left[ \begin{array} { c c } { 1 } & { - 2 } \\ { 4 } & { 5 } \end{array} \right] \text { and } f ( i ) = t ^ { 2 } - 3 t + 7 , \text { then } f ( A ) + \left[ \begin{array} { c c } { 3 } & { 6 } \\ { - 12 } & { - 9 } \end{array} \right] |
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