The LCM of 9b and 12 b is 36b. LCM is Least Common Multiple.
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Since 3b is a factor of 9b, it is automatically the GCF.
The GCF is 9b.
12(12 - b) or -12(b - 12)
The LCM is 78.
The LCM of 3 and 6 is 6 The LCM of 5 and 7 is 35. The LCM of 8 and 9 is 72. The LCM of 12 and 15 is 60.