find all zeros

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Emily
Emily 2012-4-26
f(x)=21x^3+x

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回答（3 个）

Honglei Chen
Honglei Chen 2012-4-26
You can use roots, for example for x^2-1=0
roots([1 0 -1])
http://www.mathworks.com/help/techdoc/ref/roots.html
Andrei Bobrov
Andrei Bobrov 2012-4-26
roots([21 0 1 0])
Walter Roberson
Walter Roberson 2012-4-26
http://www.mathworks.com/matlabcentral/answers/35997-accuracy-of-fzero-in-finallzeros-m
(But Please note the code error I point out in my response.)

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