Re: Writing an equation in terms of r, a and b
- To: mathgroup at smc.vnet.net
- Subject: [mg107877] Re: [mg107850] Writing an equation in terms of r, a and b
- From: Bob Hanlon <hanlonr at cox.net>
- Date: Mon, 1 Mar 2010 08:05:16 -0500 (EST)
- Reply-to: hanlonr at cox.net
eqn = r == a (-q2) + b q1 q2 + b;
Collect[eqn, {a, b}]
r == b*(q1*q2 + 1) - a*q2
Bob Hanlon
---- Rafael Cunha de Almeida <no-reply at example.com> wrote:
=============
Hello, I want to transform an equation to fit the following pattern:
r = ax + by
For instance, if I had
r = a(-q_2) + bq_1q_2 + b
I'd like make it into this:
r = a(-q_2) + b(1 + q_1q_2)
In this case x = -q_2 and y = 1 + q_1q_2. Is there a function for that? What's
it called?
[]'s
Rafael