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04-09-2018
Mathematics

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Solve for x in the equation x^2 - 4x - 9 = 29

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JiakSai JiakSai

04-09-2018

x² - 4x - 9 = 29

x² - 4x = 38

x² - 4x + (2)² = 38 + (2)²

(x - 2)² = 42

x - 2 = ±√42

x = √42 + 2 or x = -√42 + 2

x = 8.48 (nearest hundredth) or -4.48 (nearest hundredth)

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