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28-11-2017
Mathematics

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The solutions to choose the quadratic equation x^2 -8x -9 = 0 A. -21 B. -1 C. 9 D. 29

Respuesta :

28-11-2017

x² - 8x - 9 = 0
(x - 9)(x + 1) = 0
x = 9 or x = -1

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