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Hi, I need a little help with solving this question for c:


I did this already:

But I need help with the next steps... Thank you!

  • Math -

    good so far, now take out a common factor
    (2c-1)[(2c-1)^2 - (2c+1)] = 0 expand and simplify to
    (2c-1)(4c^2 - 6c) = 0
    (2c-1)(c)(4c-6) = 0
    c = 1/2 or c = 0 or c = 3/2

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