From: Drew Olson <olsonas@...>
Date: 2007-01-06T03:41:13+09:00
Subject: Re: Problem solving quadratic equations

Jay Bornhoft wrote:
> I wrote a small program to solve for x using the quadratic formula but
> instead of receiving a + and - result I am getting two identical
> answers...
> 
> Is the problem with my math or with my code?

Seems to work for me. Remember, in ruby you can use ** for 
exponentiation.

irb(main):001:0> a = 1
=> 1
irb(main):002:0> b = 2
=> 2
irb(main):003:0> c = 3
=> 3
irb(main):004:0> -b + ((b**2 - 4*a*c)/(2*a))**(1/2)
=> -1
irb(main):005:0> -b - ((b**2 - 4*a*c)/(2*a))**(1/2)
=> -3

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