What is the answer if x=2? -3x^2+14x-2

Simple...

you have: x=2 --->>> 

plug it in-->>>



=14

Thus, your answer.

The answer is B

here's why:
In mathematics, a proof is a deductive argument for a mathematical statement. In the argument, other previously established statements, such as theorems, can be used. In principle, a proof can be traced back to self-evident or assumed statements, known as axioms, along with accepted rules of inference. credit given to "mathematical" proof.com