Finding the roots for an equation

Hi everyone,

I try to solve an equation. Coefficient of this equations depends another variable like 'a' and i want to find the roots depend on 'a'. For example, i have an equation like "x^4+5*a*x^2+6*a=0" and i want to find the roots like x1=0.122a etc. How can i do that?

Thanks

Cem

Answer 1

[KSSV]

syms x a 
eqn = x^4+5*a*x^2+6*a==0 ;
s = solve(eqn,x)

s = 

[Cem Eren Aslan]

I try the same thing for following equation but it does not work.

syms x a 
eqn = x^3+5*a*x^2-6*a*a*x+a^3==0 ;
s = solve(eqn,x)

Where is the problem?

[Dyuman Joshi]

What do you mean by "does not work"?

[Cem Eren Aslan]

I get these results.

[Torsten]

syms x a 
eqn = x^3+5*a*x^2-6*a*a*x+a^3==0 ;
s = solve(eqn,x,'MaxDegree',3)

s =