Question

упростите выражение 2.8·5а -8а(-0.12) 3.5х·2у 3/7р·7/9q

Answer 1

1) 2.8*5a -8a*(-0.12) =14a +0.96a =14.96a

2) 3.5x*2y =7xy

3) 3/7p *7/9p =3*7 /7*9*p*p =1/3p²