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04-02-2021
Mathematics

contestada

x2 + 4x - 9 = 5x + 3
O A. 4
O B. -3
O C. -7
O D. 5
E. -2
F-4

Respuesta :

04-02-2021

Answer:

[tex] {x}^{2} + 4x - 9 = 5x + 3 \\ {x }^{2} - x - 12 \\ {x}^{2} - 4x + 3x - 12 \\ x(x - 4) + 3(x - 4) \\ (x - 4)(x + 3) \\ x = 4 \: and - 3[/tex]

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