Answer:
Step-by-step explanation:
The product of..2x + y and 5x - y +3....
= (2x + y) × (5x - y + 3)
= (10x² -2xy + 6x + 5xy -y² + 3y)
= ( 10x²- y² +3xy +6x + 3y)
Hope you like it...
