$$ 11 v^{2}+2 v^{2}=13 v^{2} $$ $$ 7 v^{2}-32 v=-25 \mid 13 v^{2}-23 $$ 13. Find the sum of $$ 14 z^{2} $$ and $$ -9 z^{2} $$.

Question

UpStudy AI · Accepted Answer

To find the sum of $$ 14 z^{2} $$ and $$ -9 z^{2} $$, you can follow these steps:

1. **Write the expressions together:**

$$
   14 z^{2} + (-9 z^{2})
   $$

2. **Combine like terms:**

Both terms are like terms because they both contain $$ z^{2} $$. You can add their coefficients (the numerical parts) together.

$$
   14 z^{2} - 9 z^{2} = (14 - 9) z^{2}
   $$

3. **Calculate the sum of the coefficients:**

$$
   14 - 9 = 5
   $$

4. **Write the final simplified expression:**

$$
   5 z^{2}
   $$

**Therefore, the sum of $$ 14 z^{2} $$ and $$ -9 z^{2} $$ is $$ 5 z^{2} $$.**
The sum of $$ 14 z^{2} $$ and $$ -9 z^{2} $$ is $$ 5 z^{2} $$.

\( 11 v^{2}+2 v^{2}=13 v^{2} \) \( 7 v^{2}-32 v=-25 \mid 13 v^{2}-23 \) 13. Find the sum of \( 14 z^{2} \) and \( -9 z^{2} \).