Respuesta :

Answer:

x = - 2 or x = 2

Step-by-step explanation:

Given

x² - 4 = 0 ( add 4 to both sides )

x² = 4 ( take the square root of both sides )

x = ± [tex]\sqrt{4}[/tex] = ± 2

Thus x = - 2 or x = 2

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