Question

find the product (2x+y-1) (x-2y+1)​

Answer 1

Answer:

(2x+y-1)(x-2y+1)

2x(x-2y+1)+y(x-2y+1)-1(x-2y+1)

2x²-4xy+2x+xy-2y²+y-x+2y-1

2x²-3xy+x-2y²+3y-1 is the correct answer