Tolong bantu dong :)​

f = 6k² + 2mk + m² – 2

f = 6 ( – 1 )² + 2 ( 2 ) ( – 1 ) + ( 2 )² – 2

f = 6 ( 1 ) + ( – 4 ) + 4 – 2

f = 6 – 4 + 4 – 2

f = 2 + 4 – 2

f = 6 – 2

f = 4