add. your answer should be an expanded polynomial in standard form. (-4y^3 - 5y + 16)+(4y^2 - y + 9)=

Explanation:

Step1: Remove parentheses

Since there is a plus sign before each parenthesis, the terms inside remain the same. So we have $-4y^{3}-5y + 16+4y^{2}-y + 9$.

Step2: Combine like - terms

Combine the $y$ terms: $-5y-y=-6y$, and combine the constant terms: $16 + 9=25$. The polynomial becomes $-4y^{3}+4y^{2}-6y + 25$.

Answer:

$-4y^{3}+4y^{2}-6y + 25$