Answer :

35|5
7|7
1

56|2
28|2
14|2
7|7
1

[tex]LCM(35,56)=2^3\cdot5\cdot7=280 [/tex]
first find the factors and include all of them


35=5 times 7
56= 7 times 8

the LCM is 5 times 7 times 8 or 280

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