How Dirac's energy equation led to antimatter

[Quarlep]

Hi I am curios about something we know E²=(mc²)²+(pc)² than Paul Dirac maid E²=(mc²)² than we know he find antimatter
I want to said there's a chance to E=-pc because its logical you can say photon and antiphoton is same but I think there's no reason to say this is false.

 

[Matterwave]

What?

 

[Quarlep]

I didnt understand what you don't understand

 

[Drakkith]

I'm sorry, you're going to need to make a little more effort to use correct grammar if you want your question to be understood. If english isn't your natural language, I recommend asking someone for help if you can.