Calculate roots of equations

Hi at all, (firtsly sorry for bad english, probably I'll use the wrong word).

I have a matrix in which I have memorized the coefficients of polynomials:

A=[2 2 ; 3 3 ; ... ... ...]

every row rapresents a polynomial:

A1 -> A(1,:) -> 2x + 2

A2 -> A(2,:) -> 3x + 3

An...

to resolve the equation A1=0

ax + b = 0

x= - (b/a)

I do:

xA1 = - ( A(:,1) / A(:,2) );

I do it for all n rows.

Computionally this way is too expensive;

My questions are:

1. there is a command that calculates the roots of a generic equation?

2. If that command exists, Can I apply it ( with a for-cycle ) to every equations ?

If I'm not clear, please ask me... thanks

Answer 1

[Azzi Abdelmalek]

use roots function

example

 A=[1 2 1; 4 5 8; 8 9 7]
 sol=cell2mat(arrayfun(@(x) roots(A(x,:)),(1:size(A,1)),'un',0))'