hello,everyone.I'm new here.how can i get the whole answers of an one yuan polynomial equation using fsolve?thank you so much

for example: x^7+2*x^5+3*x^3+x+7=0; I process as follows: function y=f1(x) y= x^7+2*x^5+3*x^3+x+7; command: y=fsolve('f1',-1,1) there is only an answer.

Answer 1

[Mischa Kim]

How about

 syms x
 sol = solve(x^7 + 2*x^5 + 3*x^3 + x + 7==0)

As described in the documentation, fsolve can only handle real variables. For this problem you would have to split x into real and imaginary parts.

[cnhk lucy]

thank you so much!!!