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[180 , 144]-(2100 , 1400)

Răspuns :

180=2²·3²·5
144=2⁴·3²
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c.m.m.m.c.[180,144]=2⁴·3²·5=720

2100=2²·3·5²·7
1400=2³·5²·7
c.m.m.d.c.(2100,1400)=2²·5²·7=700

720-700=20