Slimani scored five goals in 15 appearances in all competitions for Leicester in the first half of the season before joining Newcastle on loan in January, where he is yet to find the net.
"It is not easy to defend when they are attacking and attacking though, and it is hard to do everything flawless".
Jonjo Shelvey played a brilliant ball down the right for Matt Ritchie, whose low cross eventually fell to Gayle as he won a challenge with Begovic before nonchalantly backheeling the ball into the empty net.
There was still time for Bournemouth to pull off a remarkable turnaround but Newcastle did at least save a point, yet they still have plenty of work to do to preserve their top-flight status.
Florian Lejeune gets the nod ahead of Ciaran Clark at the heart of the back four, with January signing Martin Dubravka continuing in goal.
Barclays profits damaged by charges including £127m Carillion hit
Barclays' attributable loss compares with a £1.6 billion profit over the course of 2016. He added: "We have already started to see some of the benefits of our work in 2017".
The half-time whistle was greeted with boos from the home supporters and they were even more unhappy moments after the restart when referee Roger East ignored claims for a penalty after Jamaal Lascelles' clumsy challenge on Ryan Fraser.
- Bournemouth have picked up 13 points from losing positions in the Premier League this season, a joint-high along with Everton.
Newcastle had looked comfortable, and were repeatedly hitting the home side on the break, when Shelvey misses a glorious chance in the 79th minute.