How to find the product of A+ matrix and A- matrix
 

Hello All,

I am Arjun a graduate student in Aerospace engineering. I have a doubt in assignment. I need to find the product of A+ matrix and A-matrix and prove that it is equal to a null matrix. If not mistaken I guess I will have to proceed based on the flux splitting schemes, but I dont know how to go about and prove it. Could anyone please help me with this?
Thank you!