but on google I see Real Madrid is favored in that match but of course if I will favor Arsenal's victory because I have a feeling Arsenal will win.

Real Madrid has very good history when they played at home. They often did some magicals to comeback even when they were at the critical situation. That might be the reason why the are in favor to win the game. However, can't really take google as a good source to predict.
I meant Madrid is not in a good position and they went down 2 0 in term of aggregate. I'm guessing they will against the wall with 10 men + 1 goal keeper in the penalty box. It's such a hard situation for them to secure three goals without conceded a single goal.
The pressure is high for them, but i hope they can sort it out. I'm not in favor them to secure a spot tot he semi final, but hopefully they can manage it to happen.
The chance is more likely half them and half Arsenal.
Carlo Ancelotti is been an experienced coach that have trigger the big stunts and winnings for his club. A day doesn't pass by without the mastermind capitalizing on taking a lead over his oppositions. Why are we overhyping Real Madrid to accumulate a winning at Santiago Bernabéu against Arsenal tomorrow? We normally doubt Real Madrid in big games like this but we do know what they're capable of when it comes to recording a win.
The pressure is high for Arsenal because coming to Santiago Bernabeu to play Madrid, it do mean alot already for them. The atmospheric pressure alone will absolutely hammered them but Mikel Arteta should guide his team and ensure there's this confidence of boosting the performance as they did at Emirates.