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4x² - 16 = 0
4x² = 16
x² = 16/4
x² = 4
x = √4 Tiene dos soluciones
x = 2 Porque (2)(2) = 4
o
x = - 2 Porque ( - 2)( - 2) = 4
Solucion.
(2 , - 2)