ex1_9.m

Programs for the book Advanced Engineering Mathematics using MATLAB, 2ndEd.

function [x,Eflag] = quadrat(a,b,c)
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% Function to solve the quadratic equation ax^2+bx+c=0
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% CALL [x,Eflag]=quadrat(a,b,c)   
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% INPUTS:  a, b, and c coefficients as real numbers
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% OUTPUTS: x, a vector of the solutions as real or complex numbers
%	   Eflag, error condition 
%		if a=b=0, Eflag=1 since x is not defined
%		otherwise Eflag=0
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% ALGORITHM: The quadratic formula is used in the form
%		(1) x = -b/2a +/- sqrt(b^2-4ac)/2a, if a not = 0;
%		(2) x = -c/b, if a =0 and b not = 0.
% ________________________________
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Eflag=0;	% Assume result is correct
% (Program statements start here)
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