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4x² - 7 = 29
4x² = 29 + 7
4x² = 36
x² = 36/4
x² = 9
x = +/- √9 Tiene como solución dos raices reales
x = √9
x = 3 Porque 3 * 3 = 9
o
x = - √9
x = - 3 Porque (- 3)(- 3) = 9
Solución.
(3 , - 3)