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mskyeg

Use synthetic division to find P(3) for P(x) = x^4 – 6x^3 – 4x^2 – 6x – 2.

  • one year ago
  • one year ago

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  1. richyw
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    \[P(x)=x4−6x2−4x2−6x−2\] The polynomial remainder theorem says that If a polynomial \(P(x)\) is divided by \((x−r)\), then the remainder is a constant given by \(P(r)\).

    • one year ago
  2. richyw
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    so in this case you have \(r=3\), and you want to divide \(P(x)\) by \((x-3)\)

    • one year ago
  3. richyw
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    now bear with me as I have no idea how to typeset long division

    • one year ago
  4. richyw
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    Alright and I have no intention on how to learn! I'll do it by hand real quick

    • one year ago
  5. mskyeg
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    ya i dont know how to do it either:)

    • one year ago
  6. richyw
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    haha alright I didn't want to waste time by writing out each step by hand so I just filmed it. I'll upload the photo, but if it confuses you just ask me for the video! (because it is more of a process that you have to see been done to get). I made a mistake in the last step of the video though. It's fixed in the picture. Just let me upload them real quick

    • one year ago
  7. mskyeg
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    k thanks:)

    • one year ago
  8. richyw
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    So basically what you do is multiply 3 by the row 3 column 1, then put that answer in row 2 column 2. Then in row 3 column 2 you put the sum of row 1 column 2 and row 2 column 2. Then repeat the process.

    • one year ago
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  9. mskyeg
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    oooh thats pretty simple thanx for explaining it:)

    • one year ago
  10. richyw
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    no worries. And video embedding would actually be a really sweet Idea now that I think of it. I wonder if it already works.

    • one year ago
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