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Found problems: 1

1959 AMC 12/AHSME, 8
Tags: algebra , parabola , analytic geometry , conic , quadratic , optimizing quadratics
The value of $x^2-6x+13$ can never be less than: $ \textbf{(A)}\ 4 \qquad\textbf{(B)}\ 4.5 \qquad\textbf{(C)}\ 5\qquad\textbf{(D)}\ 7\qquad\textbf{(E)}\ 13 $