Results 1 to 4 of 4

Math Help - Maple making mistake?

  1. #1
    Member
    Joined
    Sep 2009
    Posts
    177
    Thanks
    1

    Maple making mistake?

    Maple is stating that (x+2)(x+3)=x(x+3)+2, which is clearly wrong. WHy is it doing this?
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Rhymes with Orange Chris L T521's Avatar
    Joined
    May 2008
    From
    Santa Cruz, CA
    Posts
    2,844
    Thanks
    3
    Quote Originally Posted by Chris11 View Post
    Maple is stating that (x+2)(x+3)=x(x+3)+2, which is clearly wrong. WHy is it doing this?
    Its not in the proper syntax to perform the operation you want it to do (which I suppose is foiling).

    You need to use the expand() command!

    expand((x+2)*(x+3));

    will return the desired result x^2+5x+6.

    OR...

    Why not do this by hand?
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Member
    Joined
    Sep 2009
    Posts
    177
    Thanks
    1
    It's not that that's a problem. I was just getting maple to evaluate integrals of a certain form, and I had factors in the denumerator of the integrand. It wasn't able to evaluate the integrals until I foiled it in my brain and rewrote the denumerator. In fact, when I told maple to take the integral, it rewrote the denumerator in the fashion that I described above. It's not that it's a major problem or anything, just a bit of an annoyance.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Rhymes with Orange Chris L T521's Avatar
    Joined
    May 2008
    From
    Santa Cruz, CA
    Posts
    2,844
    Thanks
    3
    Quote Originally Posted by Chris11 View Post
    It's not that that's a problem. I was just getting maple to evaluate integrals of a certain form, and I had factors in the denumerator of the integrand. It wasn't able to evaluate the integrals until I foiled it in my brain and rewrote the denumerator. In fact, when I told maple to take the integral, it rewrote the denumerator in the fashion that I described above. It's not that it's a major problem or anything, just a bit of an annoyance.
    Yea, that could be a bit of an annoyance. To make sure this doesn't happen again, you could try to explicitly write out * for the multiplication instead of implying it.

    For example, 4xy implies multiplication and would be treated as a single variable name in Maple, whereas 4*x*y would avoid misconception on Maple's part.

    So going back to your problem, (x+2)(x+3) should be written as (x+2)*(x+3) in your integral to avoid that misconception.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 0
    Last Post: November 30th 2011, 02:25 PM
  2. I must be making a simple mistake here.
    Posted in the Advanced Algebra Forum
    Replies: 2
    Last Post: March 25th 2010, 08:10 AM
  3. mistake?
    Posted in the Pre-Calculus Forum
    Replies: 2
    Last Post: August 10th 2009, 12:40 AM
  4. Somewhere i did mistake...
    Posted in the Calculus Forum
    Replies: 2
    Last Post: April 23rd 2008, 07:33 AM
  5. Was it my mistake?
    Posted in the Math Topics Forum
    Replies: 5
    Last Post: December 12th 2007, 05:09 AM

Search Tags


/mathhelpforum @mathhelpforum