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Solve by completing the square: x^2 - 8x + 12 = 0

x² - 8x + 12 = 0 (x - 4)² - 16 + 12 = 0 (x - 4)² - 4 = 0 (x - 4)² = 4 x - 4 = +- 2 x = 6 x = 2

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Solve x^2 + 8x + 12 = 0

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