code: def cost(x):
      ax, bx, c = x
      return (ax) ** 2 - bx + c
  
imports: from mystic.monitors import *
  from mystic.solvers import NelderMeadSimplexSolver
  from mystic.tools import random_seed
label_desc: Use image node_id 1 for calling a global function with example usage: cost(x) and returns: unknown