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Caso.
Trinomio al cuadrado perfecto.
Aplicas.
a² - 2ab + b² =
(a - b)²
169x² - 52xy² + 4y⁴ =
13²x² - 2(13x)(2y²) + 2²(y²)² =
(13x - 2y²)²
Respuesta.
(13x - 2y²)²