Student Support Forum: 'NSolve[{ab == 2, a + b == 3}, {a, b}]' topicStudent Support Forum > General > "NSolve[{ab == 2, a + b == 3}, {a, b}]"
Author 
Comment/Response 
Lino

07/30/03 5:42pm
I'm new to Mathematica and I was trying some functions. I tried to NSolve[{ab == 2, a + b == 3}, {a, b}]
the most simple and intuitive solution is: a=1, b=2.
Mathematica returns: {a > 1.10693, b > 1.89307}
Why does it choose that solution?
I know that I should ask it to Solve[x^2  3x + 2 == 0, x] but I don't know why it doesn't do that automatically.
Is there any technical reason?
By the way..I tried this because I was searching some functions to numerically solve theese simultaneous equations:
{a == 2f, b == 12  e  g, h == 16 + ab + e, c == 8 + ab, d == 4 + e}
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Subject (listing for 'NSolve[{ab == 2, a + b == 3}, {a, b}]')

Author 
Date Posted

NSolve[{ab == 2, a + b == 3}, {a, b}] 
Lino 
07/30/03 5:42pm 
Re: NSolve[{ab == 2, a + b == 3}, {a, b}] 
VL 
07/31/03 1:02pm 
Re: NSolve[{ab == 2, a + b == 3}, {a, b}] 
Forum Modera... 
08/03/03 3:19pm 
Re: NSolve[{ab == 2, a + b == 3}, {a, b}] 
Lino 
08/04/03 1:20pm 

   
 
