Concept Check Answer each question.
Only one of the following equations does not require Step 1 of the method for completing the square described in this section. Which one is it? Solve it.
A. 3x2 − 17x − 6 = 0
B. (2x + 5)2 = 7
C. x2 + x = 12
D. (3x − 1) (x − 7) = 0
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