code: def test_beale(self):
      self._check_algorithm(
          func=_beale,
          start_point=[-1.0, -1.0],
          expected_argmin=[3.0, 0.5],
          gtol=1e-8,
      )
  
imports: import numpy
  import tensorflow.compat.v2
  import tf_quant_finance
  from tensorflow.python.framework import test_util
label_desc: Use image node_id 15 for calling the ConjugateGradientTest obj's underlying member method code with example usage: obj.test_beale() without return types