15² − 63² + 27² − 22² + (54)(15) + (44)(63) =

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15² − 63² + 27² − 22² + (54)(15) + (44)(63) =

A) 53
B) 83
C) 91
D) 93
E) 105

Source: www.gmatprepnow.com
Answer: B
Difficulty level: 650-700
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