[R] solve the quadratic equation ax^2+bx+c=0

[Mike Prager]

The inquiry below and similar ones seem a lot like homework problems.  
They are distinguished by showing no evidence of the OP's ever having 
read a manual and also by being problems of apparently pedagogical 
interest. The Fortran group (comp.lang.fortran) has a long tradition of 
not giving more than the broadest of  hints in response to such 
inquiries, and I would encourage r-help readers to consider doing the same.

MHP


Yuying Shi wrote:

>If I have matrics as follows:
>  
>
>>a <- c(1,1,0,0)
>>b <- c(4,4,0,0)
>>c <- c(3,5,5,6)
>>    
>>
>How can I use R code to solve the equation ax^2+bx+c=0.
>thanks!
> yuying shi
>
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