<![CDATA[Math Is Fun Forum / [ASK] Polynomial]]> 2018-08-09T01:52:35Z FluxBB http://www.mathisfunforum.com/viewtopic.php?id=24555 <![CDATA[Re: [ASK] Polynomial]]> I get it. Thank you, bob!

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http://www.mathisfunforum.com/profile.php?id=212031 2018-08-09T01:52:35Z http://www.mathisfunforum.com/viewtopic.php?pid=405185#p405185
<![CDATA[Re: [ASK] Polynomial]]> hi Monox D. I-Fly

I also get the x^3 coefficient as -1/3  Looks like the question has a typo as none of those answers works.

I get

and this checks out correctly with the given information.

I did this by substituting x = -3, 1, 0 and -2 into ax^3 + bx^2 + cx + d and then solving for a, b, c, and d.

When you put x = -2 , 3x - 2 becomes 3 times -2 -2 = -8.

Bob

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http://www.mathisfunforum.com/profile.php?id=67694 2018-08-08T07:41:16Z http://www.mathisfunforum.com/viewtopic.php?pid=405175#p405175
<![CDATA[[ASK] Polynomial]]> 11. Given a polynomial with the degree 3. If it is divided by
, the remainder is 2x + 1. If it is divided by
, the remainder is 3x - 2. The polynomial is ....
A.

B.

C.

D.

E.

The book says that the answer is A, but I don't understand the part when they suddenly substitute f(-2) = -8, where does that come from? I tried doing it myself and got a (the coefficient of

) as
. Can you tell me what's wrong?

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http://www.mathisfunforum.com/profile.php?id=212031 2018-08-08T03:36:53Z http://www.mathisfunforum.com/viewtopic.php?pid=405169#p405169