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(x-8) (x+8) =0
x-8=0 y x+8=0
x=8 y x=-8
x² - 64 = 0
x² = 64
x = √64 Tiene 2 soluciones reales
x = √8²
x = 8 Porque 8 * 8 = 64
o
x = - √8²
x = - 8 Porque ( - 8)( - 8) = 64
Solucion.
(8 , - 8)