Respuesta :
Answer:
See picture attached
Step-by-step explanation:
I hope this helps you.
Please give me brainliest if it's correct

=2y^2 - 3y^2 - y^2 + 3yz - yz - z^2 + 6zy ( arranging the like terms )
= -2y^2 + 2yz - z^2 + 6z ( simpliflying the like terms and leaving the unlike terms same as it is rule )