0.3
Объяснение:
(60 b^3+51,3)+(70-62,8b^3)-(-2,8b^3+121)=
(60b^3-62.8b^3+2.8b^3)+(51.3+70-121)=
(60-62.8+2.8)b^3+0.3=
(60+2.8- 62.8 )b^3+0.3=
(62.8-62.8)b^3+0.3
0 +0.3=0.3
0.3
Объяснение:
(60 b^3+51,3)+(70-62,8b^3)-(-2,8b^3+121)=
(60b^3-62.8b^3+2.8b^3)+(51.3+70-121)=
(60-62.8+2.8)b^3+0.3=
(60+2.8- 62.8 )b^3+0.3=
(62.8-62.8)b^3+0.3
0 +0.3=0.3