Note that the notation

is just another way of writing

. Here, we're simply taking the expression for f(x) and adding the expression for g(x) to it. Together, we have:

Which means that

And from there, it's just a matter of combining like terms to simplify.
Okay so I will explain this the best way possible, being honest with you I am not quite sure if this is 100% accurate, but I gave it my best, and I got 10
Answer:
No
Step-by-step explanation:
Since x is squared it is a parabola. A linear function is a line. Therefore it is not linear.