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Subjects>Math>Math & Arithmetic

Solve x2 - 4x - 9 equals 0 by completing the square?

Anonymous

∙ 15y ago

Updated: 12/11/2022

x2 - 4x - 9 = 0

∴ x2 - 4x = 9

∴ x2 - 4x + 4 = 13

∴ (x - 2)2 = 13

∴ x - 2 = ±√13

∴ x = 2 ± √13

Wiki User

∙ 15y ago

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