4x2+4x+1 4x2 +4x +1 (2x )(2x ) ( +1)( +1) (2x+1)(2x+1) Factor: (2x+1)2 check: (2x+1)(2x+1) (2x)(2x) (2x)(+1) (+1)(2x) (+1)(+1) 4x2 +2x +2x +1 4x2+4x+1