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Mathematics 8 Online
OpenStudy (anonymous):

What number completes the square? x2 - 18x + ? A. 81 B. 64 C. 36 D. 324

OpenStudy (anonymous):

81

OpenStudy (hoblos):

(x-9)^2 = x2 -18x +81 ==> it is 81

OpenStudy (anonymous):

81

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