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March 26, 2017

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How do you find factors of this with long division?

2x^3 - 3x^2 + 3x -1 = 0


I just don't know how to do it because there is a coefficient in front of first term.

  • Calculus - ,

    After you tried ± 1 and that didn't work, you would now try ± 1/2
    sure enough, x = 1/2 works

    (2(1/2)^3 - 3(1/2)^2 + 3(1/2) - 1
    = 1/4 - 3/4 + 3/2 - 1
    = 0

    so (2x - 1) is a factor
    Now you can do your long division, and get the other factor to be
    (x^2 - x + 1)

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