Respuesta :

Answer:

To prove:

  • (3x + 2)² is  3y + 1

Expand the square:

  • 9x² + 6x + 4 = (9x² + 6x + 3) + 1 = 3(3x² + 2x + 1)  + 1 = 3y + 1
  • Proven

Answer:

9,12,4                          9,12,3,1          3,3,4,1

Step-by-step explanation: