Results 1 to 3 of 3

Math Help - Re-write equation without multiplication

  1. #1
    Senior Member sfspitfire23's Avatar
    Joined
    Oct 2009
    Posts
    273

    Re-write equation without multiplication

    Hi guys,

    I have an equation y = a*b + c*d

    The variables are just real numbers. How can I get this equality to hold without multiplying anything together? I have tried taking the log of each side but that doesn't work.

    Anyone have any thoughts?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member

    Joined
    May 2006
    From
    Lexington, MA (USA)
    Posts
    11,738
    Thanks
    643

    Re: Re-write equation without multiplication

    Hllo, sfspitfire23!

    Are you sure of the wording of the problem?
    I don't think it can be done.


    Rewrite without multiplication: . y \:= \:ab + cd
    The variables are real numbers.

    It might help if we knew what course this problem came from.

    If the variables were natural numbers, the task can be completed.

    . . \text{For example: }\:a\cdot b \;=\;\underbrace{b + b + b + \cdots + b}_{a\text{ terms}}


    But with real numbers . . . I see no way to rewrite  \pi\sqrt{3}
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Senior Member sfspitfire23's Avatar
    Joined
    Oct 2009
    Posts
    273

    Re: Re-write equation without multiplication

    Just a linear algebra course. My teacher wants to know whether it can be done. I don't think it can.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. write an equation
    Posted in the Algebra Forum
    Replies: 2
    Last Post: May 23rd 2010, 10:55 AM
  2. Write the equation... please
    Posted in the Algebra Forum
    Replies: 2
    Last Post: May 5th 2009, 12:36 PM
  3. Write An Equation
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: November 30th 2008, 09:16 PM
  4. Write An Equation
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: November 1st 2008, 04:46 AM
  5. Replies: 7
    Last Post: January 3rd 2007, 03:55 AM

Search Tags


/mathhelpforum @mathhelpforum