Given the trinomial 2x^2 + 4x - 2, what is the value of the discriminant?

Question

anonymous · Answer

@ehuman @Hero @terenzreignz Thanks guys :D

terenzreignz · Answer

^_^ Given a quadratic trinomial of the form 
$$\Large \color{red}ax^2 + \color{blue}bx + \color{green}c$$
The discriminant is the value 
$$\huge \color{blue}b^2 - 4\color{red}a\color{green}c$$

anonymous · Answer

Thanks the answer choices are:
0
10
32
36

terenzreignz · Answer

Just plug in the values.

anonymous · Answer

I don't know :/  I guess 32?

terenzreignz · Answer

Guessing's not allowed, particularly when I've already given you the formula :P

Look, the only thing you need to really work on is finding the precise values of a, b, and c in this situation.

terenzreignz · Answer

Here... let me colour them for you :P
But I won't entertain any guesses, okay?
$$\Large \color{red}2x^2+\color{blue}4x\color{green}{-2}$$