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Posted by on Monday, February 7, 2011 at 10:32pm.

4|3-2x6|-3^2
can you tell me how to solve? please

  • math - , Monday, February 7, 2011 at 10:36pm

    Is 2x6 supposed to be 2 x^6?
    What gets squared at the end? The -3 exponent?

  • math - , Monday, February 7, 2011 at 10:39pm

    Is this your problem?

    4|3 - 2x^6| - 3^2 = ?

    I think you must have copied this wrong.

    This problem, as typed, is not easy to solve.

    I used an online calculator and there are 12 different roots for x (4 real and 10 complex.

    Re-check your problem.

  • math - , Monday, February 7, 2011 at 10:40pm

    no its just how i put it. yes

  • multiple posts - , Monday, February 7, 2011 at 10:42pm

    angiie,
    Please refrain from multiple posts. The time for teachers to read multiple posts or to determine if they are multiple posts could very well be used for answering questions.

  • math - , Monday, February 7, 2011 at 10:46pm

    You need to answer drwls questions above so he/she can help you.

  • math - , Monday, February 7, 2011 at 10:47pm

    MathMate
    sorry i didn't know it did that. my commputer was taking a while to load and i clicked a few times before i let it load. sorry agaiin

  • math - , Monday, February 7, 2011 at 10:51pm

    to drwls
    My equation was just how i put it. 2x6 is not supposed to be 2 x^6. its just 2x6.
    And the -3 exponent yes it gets squared at the end.

    what dose these lines mean | | squareroot?

  • math - , Monday, February 7, 2011 at 10:55pm

    Assuming you mean:
    4|3-2x^6|-3²=0

    Then
    4|3-2x^6|=3²
    |3-2x^6|=9/4
    There are two cases,
    a. when 3-2x^6 >0
    |3-2x^6|=9/4
    => 3-2x^6=9/4
    => 2x^6=3-9/4=3/4
    => x^6=3/8
    => x=±(3/8)^(1/6) (x∈ℝ, i.e. x is real)

    b. when 3-2x^6<0
    |3-2x^6|=9/4
    => -(3-2x^6)=9/4
    => 2x^6=9/4+3=21/4
    => x^6=21/8
    => x=±(21/8)^(1/6) (x∈ℝ)

    As Helper said, there are 2*4 complex roots which we do not consider in the real domain.

  • math - , Monday, February 7, 2011 at 10:56pm

    If there is no x, then you don't have a variable!

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