how to dynamically build a function and find root python

Question

data = pd.DataFrame(columns = [\'n\',\'m\',\'value\',\'x\'], index = [1,2,3,4])
data[\'n\'] = [3,4,5,2]
data[\'m\'] = [1,2,3,2]
data[\'value\'] = [0.2,0.5,0.3,0.9]
<