Roots function not working

Hi, When i use the roots command i receive an error:

??? Input argument "b" is undefined.

Error in ==> roots at 4 rad=sqrt(b^2-4*a*c);

Error in ==> p7 at 6 roots(b)

and when i use "help roots" it returns:

comments comments

Answer 1

[the cyclist]

Have you defined your own function called "roots"? Try the command

 >> which roots

[Patrick]

thank you! im still a rookie at this and my professor made us make a "roots" program