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3x² + 147 = 0
3x² = - 147
x² = - 147/3
x² = - 49
x = +/-√(49)(-1) = Aplicas propiedad de la radicacion √(a * b)= √a * √b
x = + / -√49 * √ -1 Pero 49 = 7 * 7 = 7² y √-1= i
x = + / - √7² i
x₁ = +√7² i
x₁ = 7i
o
x₂ = - √7² i
x = - 7i
Solucion.
(7i , - 7i)