I have couple of questions, all of them are related. I ask them because I am going to start my computer graphics course at university soon,
so first I wanted to know if to make a 2D/3D game I need to learn computer graphics?
does computer graphics knowledge will result a better game performance?
and is it better just to learn some game engine like unity or unreal and avoid the mathematical part because it takes time?
I will be happy to hear some tips also, thanks 
1. No, but somebody who knows computer graphics needs to be involved in your project.1. so first I wanted to know if to make a 2D/3D game I need to learn computer graphics?
2. does computer graphics knowledge will result a better game performance?
3. and is it better just to learn some game engine like unity or unreal
4. and avoid the mathematical part
5. because it takes time?
"...because it takes time"
I'm afraid that everything in life that is worth writing home about, takes time to learn. It's an investment. But we're not talking decades. But when you're saying that you want to avoid the math that is involved in gamedev (which isn't usually that advanced), I'm wondering if this is really the industry for you. That's like saying that you want to be a comedian, but you don't wanna tell jokes. Sure not all comedians tell jokes, but seriously?
Just my two cents.
"...because it takes time"
I'm afraid that everything in life that is worth writing home about, takes time to learn. It's an investment. But we're not talking decades. But when you're saying that you want to avoid the math that is involved in gamedev (which isn't usually that advanced), I'm wondering if this is really the industry for you. That's like saying that you want to be a comedian, but you don't wanna tell jokes. Sure not all comedians tell jokes, but seriously?
Just my two cents.
Vice versa, I love mathematics. but I am trying to understand if making a game with an engine like Unity or Unreal is much faster than making a game without it.
If you know how those engine should be used, and you write a game that fits on them, it's faster.
Otherwise, ymmv.
You don't need bleeding-edge computer graphics knowledge to make a game, but no college course achieves that level of education anyways -- A Masters or Phd. Thesis might stand at a par to bleeding-edge research coming out of industry (or sometimes surpassing but then often not practical for real-time for some number of years) but your undergrad coursework won't make you anything terribly special.
Your typical undergraduate-level course -- even good ones -- aren't especially advanced. Doing well in those classes is not the end of the road for your learning, and usually are just enough to get you standing on your own feet as an entry-level professional. Those courses are there to provide strong foundations, nothing more, and aceing your computer graphics class doesn't then qualify you as a "graphics programmer" to any standard.
I would say that your typical undergrad courses in computer graphics are a bare minimum for people who want to go on to write games. You'll need to know how how to cast a ray and reflect it from a surface, you'll need to know whether that ray hit a triangle first, you'll need to know how a transformation matrix works and how to concatenate them together, you'll need to know LERP/SLERP -- no, these aren't strictly graphics concepts, but computer graphics is usually the course where these kinds of things are pulled together in a practical, hands-on way.
And even if you never come to writing your own versions of these things as a professional need, you need to understand them conceptually just to use them effectively, and more than just conceptually when you have to debug issues with the systems you're using. The fact that good engines exist doesn't mean you can get by without understanding what goes on behind the curtain.
I would say definitely do take the computer graphics courses, unless the alternative is that you can substitute a heavier focus on mathematics that will also cover these kinds of topics (or sufficient for you to really study and understand them on your own) *and* you are the kind of person who's willing and able to do the work of understanding on your own.
>> to make a 2D/3D game I need to learn computer graphics?
technically, no. an engine or library of some sort can be used.
>> does computer graphics knowledge will result a better game performance?
depends. it might keep you from using an engine or library in an inefficient manner. it definitely helps if you're writing your own engine or graphics library.
>> is it better just to learn some game engine like unity or unreal and avoid the mathematical part because it takes time?
engines are used to save time on development - not to avoid having to learn math. using an engine means less code to write.
