Re: Solving linear systems in matrix notation?
- To: mathgroup at smc.vnet.net
- Subject: [mg68233] Re: [mg68187] Solving linear systems in matrix notation?
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Sun, 30 Jul 2006 04:47:58 -0400 (EDT)
- Reply-to: hanlonr at cox.net
- Sender: owner-wri-mathgroup at wolfram.com
Solve[{2x + 4y == -4, 5x + 7y == 11}, {x, y}]
{{x -> 12, y -> -7}}
Solve[{{2,4},{5,7}}.{x,y}=={-4,11},{x,y}]
{{x -> 12, y -> -7}}
Solve[{{2,4,-4},{5,7,11}}.{x,y,-1}==0,{x,y}]
{{x -> 12, y -> -7}}
LinearSolve[{{2,4},{5,7}},{-4,11}]
{12,-7}
LinearSolve[{{2,4},{5,7}}][{-4,11}]
{12,-7}
Bob Hanlon
---- Ben <ben.carbery at spam.me> wrote:
> Hi,
>
> I have been following a tutorial that says to solve systems of linear equations like so:
>
> Solve[{2x + 4y == -4, 5x + 7y == 11}, {x, y}]
>
> I am wondering if there is a shorthand way to do it by just entering the co-efficients of each equation, i.e. matrix style:
>
> Solve??[{2,4,-4},{5,7,11}]
>
> cheers,
>
> Ben C.
>