Is 9 a factor of 56a+12b? yes or no

2 answers

56 a + 12 b = 2 (28 a + 6 b) = 2 * 2 * (14 a + 3 b)
I do not see any 3 * 3 in there
No, 9 is not a factor of 56a + 12b.
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