Respuesta :

altavistard

Answer:

72 + 9 = 9(8 + 1) = 9(9) = 81

Step-by-step explanation:

Starting with 72 + 9, factor out the 9, obtaining 9(8 + 1),

which in turn can be rewritten as 9(9).  Multplying, we get 81.  This is the final answer, equivalent to 72 + 9.