Results 1 to 5 of 5
Like Tree1Thanks
  • 1 Post By Plato

Math Help - solve the equation (complex number)

  1. #1
    Junior Member
    Joined
    Aug 2012
    From
    The Earth
    Posts
    71
    Thanks
    1

    solve the equation (complex number)

    Hey everyone, here is the question : Solve the equation z^2 + ( 4 - 2i )z - ( 2 - 8i ) = 0

    I try to solve this one with formula (-b∓√4ac)/2a , but i can't get the correct answer.
    Any other ways to find out the z value? Please show me how me how to do that. Thank you.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,403
    Thanks
    1486
    Awards
    1

    Re: solve the equation (complex number)

    Quote Originally Posted by alexander9408 View Post
    Hey everyone, here is the question : Solve the equation z^2 + ( 4 - 2i )z - ( 2 - 8i ) = 0

    I try to solve this one with formula (-b∓√4ac)/2a , but i can't get the correct answer.
    Any other ways to find out the z value? Please show me how me how to do that. Thank you.
    Look at this.
    Thanks from alexander9408
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Aug 2012
    From
    The Earth
    Posts
    71
    Thanks
    1

    Re: solve the equation (complex number)

    What about the step? I tried using the formula and complete the square and i can't get the answer.......
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,403
    Thanks
    1486
    Awards
    1

    Re: solve the equation (complex number)

    Quote Originally Posted by alexander9408 View Post
    What about the step? I tried using the formula and complete the square and i can't get the answer.......
    Click the "show steps" tab on that webpage.
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Junior Member
    Joined
    Aug 2012
    From
    The Earth
    Posts
    71
    Thanks
    1

    Re: solve the equation (complex number)

    oh thanks, just one last question, is that ∓(3+i)= ∓(3-i) ?
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 1
    Last Post: February 13th 2010, 12:51 PM
  2. how to solve this complex number question..
    Posted in the Calculus Forum
    Replies: 3
    Last Post: November 20th 2008, 12:47 PM
  3. Need help on TI-89 to solve Complex number
    Posted in the Calculators Forum
    Replies: 3
    Last Post: May 14th 2008, 11:25 AM
  4. Replies: 1
    Last Post: November 29th 2007, 06:13 AM
  5. Replies: 4
    Last Post: August 14th 2007, 10:52 PM

Search Tags


/mathhelpforum @mathhelpforum