Different results by changing the position of some variables

Hi everyone,

I am just confused when I change the results of some variable, I get the different results. All parameters below are real. So actually I should get the same results.

First Running: (f1+f2+f3)*(results(1)*results(1))+(f4+f5+f6)*results(1)+(f7+f8+f9-1)

ans =

     0

Second Running: (f1*(results(1)*results(1))+f4*results(1)+f7)+(f2*(results(1)*results(1))+f5*results(1)+f8)+(f3*(results(1)*results(1))+f6*results(1)+f9)-1

ans =

   -0.3128

I really appreciate if someone can answer my question!

Best regards

Answer 1

[Alex Lee]

actually I have just decompose the equation, I get the different results