Answer:
z^3 + 8 z^2 + 3 z + 3
Step-by-step explanation:
Simplify the following:
z^3 + 7 z^2 + z^2 + 2 z + z + 3
Grouping like terms, z^3 + 7 z^2 + z^2 + 2 z + z + 3 = z^3 + (7 z^2 + z^2) + (z + 2 z) + 3:
z^3 + (7 z^2 + z^2) + (z + 2 z) + 3
7 z^2 + z^2 = 8 z^2:
z^3 + 8 z^2 + (z + 2 z) + 3
z + 2 z = 3 z:
Answer: z^3 + 8 z^2 + 3 z + 3
