Ta có
\(630=2.5.7.3^2\)
\(420=7.2^2.3.5\)
\(\RightarrowƯCLN\left(630,420\right)=2.7.3.5=210\)
Vậy ƯCLN ( 630,420)=210
~ Hok Tốt~
630 = 2.32.5.7
420 = 22.3.5.7
=> ƯCLN( 630;420 )= 2.3.5.7 = 210
Ta có : 630 = 2 . 32 . 5 . 7
420 = 22 . 3 . 5 . 7
=> ƯCLN ( 630 ; 420 ) = 2 . 3 . 5 . 7 = 210
Vậy ƯCLN ( 630 ; 420 ) = 210