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x² + 4 = 0
x² = - 4
x = √ - 4 Tiene 2 soluciones imaginarias o complejas
x =√(4 * - 1) = Aplicando propiedad de la radicacion √ab = √a * √b
x = √4 * √-1 = Pero √- 1 = i
x = √4 i
x = 2i
o
x = - √4 i
x = - 2i
Solucion.
(2i , - 2i)