code: def testFindsAllRootsUsingFloat32(self):
      self._testFindsAllRoots(
          objective_fn=polynomial5,
          left_bracket=[-4, 1],
          right_bracket=[3, -1],
          dtype=tf.float32,
          expected_roots=[-0.14823253010472962, -0.14823253013216148],
          expected_num_iterations=[],
          assert_check_for_num_iterations=False,
      )
  
imports: import math
  import tensorflow.compat.v2
  import tf_quant_finance
  from tensorflow.python.framework import test_util
  from tf_quant_finance.math.root_search import utils
label_desc: Use image node_id 4 for calling the BrentqTest obj's underlying member method code with example usage: obj.testFindsAllRootsUsingFloat32() without return types