Too many input arguments.

I try to solve an equation with the euler method

Why do i have too many arguments in my input? It shouldn't put that values in the parenthesis?

Answer 1

[Alejandro Peñuelas]

Poly just accepts 1 parameter either a vector or a matrix, the 'x' in the poly function is the problem.

[Alejandro Peñuelas]

Try

poly([-1 1 -2 2]);