Answer:
10x²+3xy+6x-y²+3y
Step-by-step explanation:
(2x+y)(5x-y+3) steps
2x(5x-y+3)=10x²-2xy+6x
y(5x-y+3)= 5xy-y²+3y
add: 10x²-2xy+6x+5xy-y²+3y
