Question

Need help with thiss

Answer 1

Hello!

10 (2a³ +a² -a) + 2 ( 4a^4)

= 20a³ + 10a² -10a + 8a^4

= 8a^4 +20a³ -10a² -10a

Answer 2

There are 10 sides that are equal to
`2a^(3) +a^(2) - a`, and 2 sides equqal to
`4a^(4)`

Perimeter :
`20a^(3) + 10a^(2) - 10a + 8a^(4)`