Respuesta :

Answer:

9m²n⁴

Step-by-step explanation:

9m²n⁴ = 3² × m² × n⁴

72m⁸n⁴ = 2³ × 3² × m⁸ × n⁴

GCF = multiplication of all common factors amongst the 2 expression with the lowest power(yes it's the lowest power)

GCF = 3²m²n⁴ = 9m²n⁴