[Date Index]
[Thread Index]
[Author Index]
Re: simplifying rational expressions
*To*: mathgroup at smc.vnet.net
*Subject*: [mg61111] Re: simplifying rational expressions
*From*: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
*Date*: Tue, 11 Oct 2005 03:20:04 -0400 (EDT)
*Organization*: The Open University, Milton Keynes, UK
*References*: <did2q0$qde$1@smc.vnet.net>
*Sender*: owner-wri-mathgroup at wolfram.com
krily wrote:
> If someone could be so kind as to show me how to simplify the following:
>
> [(t^4-1)(t^2-9)(t-9)^2]/[(t^4-81)(t^2+1)(t+1)^2]
>
First, use the correct syntax to group expressions: right and left
parentheses rather than right and left squared brackets.
In[1]:=
expr = ((t^4 - 1)*(t^2 - 9)*(t - 9)^2)/((t^4 - 81)*(t^2 + 1)*(t + 1)^2)
Out[1]=
((-9 + t)^2*(-9 + t^2)*(-1 + t^4))/((1 + t)^2*(1 + t^2)*(-81 + t^4))
Then, *Cancel* could be a good start to simplify rational expression
In[2]:=
Cancel[expr]
Out[2]=
((-9 + t)^2*(-1 + t))/((1 + t)*(9 + t^2))
Hope this helps,
/J.M.
Prev by Date:
**simplifying ^ fails, on exact numerical constants in Mathematica 5.0**
Next by Date:
**Re: surface intersection**
Previous by thread:
**Re: simplifying rational expressions**
Next by thread:
**surface intersection**
| |