Question

I don’t understand this

Answer 1

29a+7a+5

Explanation:

Find the like terms and add them

Multiply 3a three times add 8a to it so 21a+8a=29a

Multiply 4a 2 times

You will have 16a - 9a= 7a

Now subtract 11-6=5

Answer 2

3a^3 + 4a^2 - a + 5

Explanation:

= 3a^3 + 8a - 6 + 4a^2 - 9a + 11

= 3a^3 + 4a^2 + 8a - 9a - 6 + 11

= 3a^3 + 4a^2 - a + 5