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kajsa ㅇㅅㅇ

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About kajsa ㅇㅅㅇ

  • Birthday 06/22/1926

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  • Member Title
    this is the breath
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    she/her
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    in my head
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    drawing
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  1. kajsa ㅇㅅㅇ

    Guys... I need help. (@The Aspiring Archivist @The Wandering Wizard cough cough)

    I need to factor a trinomial but it's not cooperating. I can't find the two factors that multiply to sixteen but add/subtract to negative four. Two and eight don't work, and neither do 4 and 4... but it needs to be solved because my teacher said that none of the radical expressions would be no solutions. 

    ...maybe I should back up.

    Here's the problem:

    n^2 - 4n + 16 = 0

    It's a pretty basic polynomial, but I can't figure out how to factor it for the life of me...

    I need new brain cells xD

    1. Show previous comments  7 more
    2. The Aspiring Archivist

      The Aspiring Archivist

      There are no solutions. If you try to compute it using the quadratic formula, you get a negative number in the radical, which is impossible. So either you read the question wrong, or your teacher messed up.

    3. kajsa ㅇㅅㅇ

      kajsa ㅇㅅㅇ

      Quote

      There are no solutions. If you try to compute it using the quadratic formula, you get a negative number in the radical, which is impossible. So either you read the question wrong, or your teacher messed up.

      I wrote no solutions.

      I know I didn't read it wrong because I spent 30 minutes in Science class trying to figure it out and reading it over and over :P 

      Thanks Archie :) 

    4. solarcat

      solarcat

      Use the quadratic formula and you get an answer with an imaginary number? I think it's n=2+rad(3) multiplied by 2i

      and n= 2+rad(3) multiplied by -2i

      I guess it is undefined

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