Answer:
72 + 9 = 9(8 + 1) = 9(9) = 81
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.
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