code: def _line_func_2(self, x):
      f = jnp.dot(x, jnp.dot(self.A, x)) + 1
      df = jnp.dot(self.A + self.A.T, x)
      return f, df
  
imports: from absl.testing import absltest
  import scipy.optimize
  import jax
  from jax import grad
  from jax import config
  import jax.numpy
  import jax._src.test_util
  from jax._src.scipy.optimize.line_search import line_search
label_desc: Use image node_id 7 for calling the TestLineSearch obj's underlying member method code with example usage: obj._line_func_2(x) and returns: f,  df