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x² = 3x² - 98
98 = 3x² - x²
98 = 2x²
98/2 = x²
49 = x² Tiene 2 soluciones
√49 = x
7 = x Porque 7 * 7 = 49
o
-√49 = x
- 7 = x Porque (-7)(-7) = 49
Solucion.
(7 , - 7)