A poster has an area of 432 square inches. The length x in inches is 6 inches longer than the width of the poster. Which can be solved to determine the length, in inches, of the poster?
A) x^2 - 6 = 432
B) x^2 - 6x = 432
C) x^2 + 6 = 432
D) x^2 + 6x = 432
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