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Aplicas productos notables.
La suma por la diferencia de dos cantidades.
Aplicas.
(a + b)(a - b) = a² - b²
(3x + 2)(3x - 2) =
(3x)² - (2)² =
3²x² - 4 =
9x² - 4
Respuesta.
9x² - 4
9x²-4