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Productos Notables.
(a + b)² =
a² + 2ab + b²
(2x + 3)² =
(2x)² + 2(2x)(3) + 3² =
2²x² + 12x + 3 * 3 =
4x² + 12x + 9
Respuesta.
4x² + 12x + 9