A wonderful team goal scored by Alexandre Lacazette gave the visitors the half-time lead before Gabriel Martinelli marked his recall to the team with a goal. Lacazette struck again late on for his 50th Premier League goal for the Gunners.
Sunday’s 3-0 success was Arsenal’s first clean sheet in 14 matches in all competitions and the three points moved Mikel Arteta’s team up to ninth in the table, seven points behind sixth-placed Liverpool.
For the Blades, it was a 25th Premier League loss of the season and they remain rooted to the bottom of the table. A third straight defeat for interim boss Paul Heckingbottom - a second in the league - leaves the South Yorkshire club 18 points from safety with seven games to go.