How to write nonlinear equation with several variables to use with bisection?

I'm new to MATLAB so forgive me if this question already exists, I'm just not sure what to search for exactly.

Basically I have the following equation:

4ba^3 + c^3 - 3a*c^2 = 0

I thought I would need to write the following function:

function output = myFunction(a,b,c)
output = 4ba^3 + c^3 - 3a*c^2;
end

and then I could call the bisection method like so:

a = some value
b = some value
bisection(@myFunction,Xl,Xr,iterations,tolerance)

but I get an error not enough inout arguments, which I can only attribute to the lack of a specified c, which I thought the bisection would handle.

How do I correctly write the function so I can use it with bisection?

Answer 1

[Matt J]

a = some value
b = some value
bisection(@(X) myFunction(a,b,X),Xl,Xr,iterations,tolerance)