(2x + y)^2. +( x + 2y +1 ) Please yaa yg tau jawab +pakai cara yups Thanks

(2x+y)²+(x+2y+1)
(2x+y).(2x+y)+(x+2y+1
(4x²+2xy+2xy+y²)+(x+2y+1)
4x²+4xy+y²+x+2y+1
x+4x²+4xy+y+y²+1