The Brainliest Answer!
Simply combine the exponents of the variables (if needed). About the integers, just multiply as usual. We can use the Latice Method in multiplying polynomials. 
For example, (2x + 3)(3x + 5) 
                                   2x       +3
                        3x       6x²      6x
                       +5       10x      15

Add them. 
6x² + 6x + 10x + 15
6x² + 16x + 15

In multiplying binomial, we can use the FOIL method but using Latice is better that you can use it always. Hope you understand my explanation ☺ even tho it's not that clear. But still, I hope it helped.

3 5 3
It really helped a lot thanks again :----)
also, we can only use FOIL method in binomial ONLY not trinomial and the others..
Your welcome ☺
Thanks for the information :-----)
your welcome ☺