Explain, in your own words, how to evaluate a polynomial for a given value of the variable. Demonstrate the process with an example.

Question

anonymous · Answer

Evaluate x^2 -1 when x is 1.

Describe what you did.

anonymous · Answer

I guess my question is that answer 1 or -1? if so then I can explain it. If not can you help me understand that?

anonymous · Answer

There is a difference between a "polynomial" and a "polynomial equation".

The first is like I gave you.

The second is if you put the polynomial equal to something (say 0).

So if it's just a polynomial, you put x = 1 and 1-1 = 0.

If it's an equation then your plus/minus 1 is correct.

<OK?

anonymous · Answer

Ah! I think I understand. I see where I made my mistake. We just started working on these types of problems and they are a bit confusing after jumping from my last chapter.

anonymous · Answer

Thank you for your help! :)

anonymous · Answer

u r welcome.