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x² - 5 = 120
x² = 120 + 5
x² = 125
x = + / - √125 Tiene como soluci+on dos raices irracionales
x = √125
x = √(25 * 5)
x = 5√5 Porque (5√5)(5√5) = 125
o
x = - √125
Solución.
(5√5 , - 5√5)
x = - √5 Porque (- 5√5)(- 5 √5) = 125