Question

Упростите выражение 5/12а+3/4а-1/2
при а=2,1

Answer 1

а*(5/12+3/4)-1/2=2,1*(5/12+9/12)-1/2=21/10*14/12-1/2=49/20-1/2=2 9/20-10/20= 1 29/20-10/20=1 19/20=1,95