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Multiplicando cada uno de sus miembros de manera distributiva
Obtenemos
+ 3X + 5X + 15
+ 8X + 15
Productos Notables
(x + a)(x + b) =
x² + (a + b)x + (a)(b)
(x + 5)(x + 3) =
x² + (5 + 3)x + (5)(3) =
x² + 8x + 15
Respuesta.
x² + 8x + 15