Answer:
It is option 4.
Step-by-step explanation:
Key skills needed to solve this problem: Combining like terms and simplifying
1) We have to combine like terms and simplify to the maximum
- We first start with 3xy and - 3xy. These cancel out as they add up to make 0.
- Next. there is y^2 and -y^2. These also cancel out.
- The only 2 terms left are 20 and 10 which add up to make 30.
Therefore, it is option 4.
Hope you understood! Have a nice day!! :D
