Aaron Ramsey scored in the 30th minute and Alexandre Lacazette added the second goal in the 83rd minute in a dominant performance at Emirates Stadium for Arsenal, who have won 10 straight home league games within a single season for the first time since May 1998.
Arsenal fans were left frustrated in the January window when the club did not have the funds to adequately strengthen the team and were only in the market for loan deals. However, the goal was disallowed because Sokratis Papastathopoulos was tugging the shirt of an opponent.
Guendouzi clipped a pass to Lacazette and he redirected it to Aubameyang, who cleverly headed the ball over the statuesque Jamaal Lascelles.
Lacazette was surrounded by three defenders and as he twisted to find space, the ball cannoned off DeAndre Yedlin into Ramsey's path and he guided a low shot past Newcastle keeper Martin Dubravka via the far post.
His night ended prematurely when he picked up an injury in the 66th minute and immediately signalled to come off. "He is helping us and is playing with a very good performance and scoring".
The Arsenal boss is unlikely to have the required amount of funds to compete with the other top six sides in the Premier League for the best players in the market.
Pierre Emerick Aubameyang would then head the ball beautifully on to Lacazette's path for the latter to put flawless amount of power and height for the ball to float over the keeper and into the net.
Elneny has been limited to five league appearances this season, including two starts and will hope to get involved when Arsenal visit the Goodison Park to tackle Everton on Sunday.