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nikkimae

  • 3 years ago

how do you factor a polynomial ?

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  1. inkyvoyd
    • 3 years ago
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    Depends. Do you have an example?

  2. inkyvoyd
    • 3 years ago
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    In short, one usually uses the rational roots theorem to determine possible rational roots. the theorem can give a long list of possible roots, but that list of complete for rational roots. After those are tested, one must use other methods.

  3. nikkimae
    • 3 years ago
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    16B(4)+8B(2)+20B

  4. inkyvoyd
    • 3 years ago
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    Absolute factorization of a polynomial of degree 4 (quartic) or less is possible with the quartic, cubic, and quadratic pformulas.

  5. inkyvoyd
    • 3 years ago
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    @nikkimae , for this example, you want to factor out all common factors first. You can reduce the expression into: 4B(4B^3+2B+5)

  6. inkyvoyd
    • 3 years ago
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    Nex you need to factor the resulting expression. You can use the rational roots theorem for ideas here.

  7. nikkimae
    • 3 years ago
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    then you just multiply right?

  8. inkyvoyd
    • 3 years ago
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    ?

  9. nikkimae
    • 3 years ago
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    what do you do after you have reduce the expression?

  10. inkyvoyd
    • 3 years ago
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    You are attempting to simply the expression into factors. YOu do not multiply after - the whole point of factoring is to "undo" the multiplying.

  11. nikkimae
    • 3 years ago
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    ohhhh okay i got it thanks :)

  12. inkyvoyd
    • 3 years ago
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    okay - let me know if you need anymore help - note that that expression is not the final answer.

  13. nikkimae
    • 3 years ago
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    okay

  14. nikkimae
    • 3 years ago
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    okay one question how did you exactly reduce the expression ? i have exams and i need to know this stuff

  15. inkyvoyd
    • 3 years ago
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    use this to simply what is inside the parenthesis, http://www.purplemath.com/modules/rtnlroot.htm

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