Choose the Correct Letter for Each Question $x ^ { 2 } - 6 x + 8$

Multiple Choice

Choose the correct letter for each question.
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-none

A) $x ^ { 2 } - 6 x + 8$
B) $x ^ { 2 } + 10 x + 25$
C) $x ^ { 2 } + 10 x + 30$