x² - (x - 4)(x + 4) = 2x
x² - (x² - 16) = 2x
x² - x² + 16 = 2x
2x = 16
x = 8
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Verified answer
x² - (x - 4)(x + 4) = 2x
x² - (x² - 16) = 2x
x² - x² + 16 = 2x
2x = 16
x = 8