Re: Problems with Solve

• To: mathgroup at smc.vnet.net
• Subject: [mg17032] Re: [mg17010] Problems with Solve
• From: Maarten.vanderBurgt at icos.be
• Date: Wed, 14 Apr 1999 02:11:49 -0400
• Sender: owner-wri-mathgroup at wolfram.com

```Tanveer,

You can use the ReplaceAll (/.) substitution command as in the example
below.
Here the two solutions of x^2 + a == b are stored in variables x1 and x2.

In[1]:= sol = Solve[x^2 + a == b, x]
Out[1]= {{x -> -Sqrt[-a + b]}, {x -> Sqrt[-a + b]}}

In[2]:=   x1 = x /. sol[[1]]
x2 = x /. sol[[2]]
Out[3]= -Sqrt[-a + b]
Out[4]=  Sqrt[-a + b]

Maarten

___________________________________________________________________________
____

Maarten van der Burgt

R&D Department

ICOS Vision Systems
Esperantolaan 9
B-3001 Leuven
Belgium
tel.    + 32 16 398220       direct  + 32 16 398316     fax.    + 32 16
400067
e-mail: maarten.vanderburgt at icos.be

___________________________________________________________________________
____

Tanveer Choudhury <tanveer at wam.umd.edu> on 10-04-99 08:13:40 AM

Subject: [mg17032]  [mg17010] Problems with Solve

I have an equation
eqn == rhs

Solving in the following way

Solve[eqn,x]

the output is something like

x->2.11

how do I save the value for x to someother variable...

u can mail to tanveer at wam.umd.edu

thanx

```

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