Respuesta :

Answer:

3(x + 9)(x + 9)

Step-by-step explanation:

  1. 3x^2 + 54x + 243
  2. 3(x^2 + 18x + 81)

a + b = 18

a + b = 81

a= = 9, b = 9

3. 3(x + 9)(x + 9)