Respuesta :

Space

Answer:

10x² + 3xy + 6x + 3y - y²

Step-by-step explanation:

Step 1: Distribute

10x² - 2xy + 6x + 5xy - y² + 3y

Step 2: Combine like terms

10x² + 3xy + 6x + 3y - y²

And we have our final answer!