Solve 0 = (x – 4)2 – 1 by graphing the related function.What are the solutions to the equation?

Graph the related function y = (x − 4)² − 1. Its x-intercepts occur when y = 0, so (x − 4)² = 1, giving x − 4 = −1 or 1. Thus the solutions are x = 3 and x = 5, which is choice D.

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