Question

Упростите выражение 0.9(5/18a- 0.4b)-0.5(3.8b-1/2a)

Answer 1

0.9(5/18a- 0.4b)-0.5(3.8b-1/2a)=9/10*5/18а-0,36b-1.9b+0.5*0.5a=1/4a-2.26b+0.25a=0.25a-2.26b+0.25b=0.5a-2.26b