Ta có: \(8=2^3\)
\(12=2^2\cdot3\)
\(15=3\cdot5\)
Do đó: \(BCNN\left(8;12;15\right)=2^3\cdot3\cdot5=8\cdot3\cdot5=120\)
Ta có:
8 = 23 ; 12 = 22 . 3 ; 15 = 3 . 5
=> BCNN(8,12,15) = 23 . 3 . 5 = 120
8=2^3
12=2^2.3
15=3.5
Vậy:BCNN(8;12;15)=2^3.3.5=120