(2x - 7)(2x + 7) = (2x - 3)² + 14
4x² - 49 = 4x² - 12x + 9 + 14
4x² - 4x² + 12x= 23 + 49
12x = 72
x = 6
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(2x - 7)(2x + 7) = (2x - 3)² + 14
4x² - 49 = 4x² - 12x + 9 + 14
4x² - 4x² + 12x= 23 + 49
12x = 72
x = 6