Use synthetic division and the Remainder Theorem to find P(–2) if P(x) =
x^4 + 2x^3 – 8x^2 –18x – 9.

6

5

4

none of these
@mathstudent55

Question

Use synthetic division and the Remainder Theorem to find P(–2) if P(x) = 
 x^4 + 2x^3 – 8x^2 –18x – 9.

­6

­5

­4

none of these
@mathstudent55

flcon04 · Answer

What do you think is the answer?

decarr432 · Answer

Do you know how to do synthetic division?

flcon04 · Answer

Yes.

18jonea · Answer

5 or 4

flcon04 · Answer

-5

flcon04 · Answer

so it would be D.

18jonea · Answer

can you show me how

decarr432 · Answer

@flcon04 please do not tell the answer help them to figure it out, that is the point of open study!

flcon04 · Answer

He said it was 5 or 4 so he was technically right @Decarr432

18jonea · Answer

so its -5

flcon04 · Answer

@18jonea do you know how to do synthetic division?

18jonea · Answer

not really but is the answer to this -5?

flcon04 · Answer

yes its -5.

18jonea · Answer

ok thank you

decarr432 · Answer

It doesn't matter its still the point to help the student reach the answer on their own not to just tell the answer please remember that

flcon04 · Answer

@Decarr432 what do you mean it doesnt matter he reached it himself.

flcon04 · Answer

i just simply told him he was right.

decarr432 · Answer

No you started by telling him the answer he had to do no work in order to find it which means he didn't work it learning how to find it later on his own

flcon04 · Answer

he found out it was 5 or 4 @Decarr432 so don't say he had to do no work. i asked him at the beginning what he thinks is the answer.

decarr432 · Answer

All that could have been was a guess

flcon04 · Answer

@Decarr432 dont falsely accuse someone of making a guess he tried

decarr432 · Answer

You may never know that some people do