Answer
The answer is $-26$.
Work Step by Step
We insert $x = 3$ in $1 - 12x +x^2$:
$1 - 12x +x^2 = 1 - 12 \cdot 3 +3^2 = 1- 36 + 3 \cdot 3 = 1 - 36 + 9 = -26$.
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