Compute complex solutions in quadratic equations

[liam]

Hi, my homework is to solve quadratic equations and compute complex solutions(the solutions to the quadratic equations are not real numbers). Furthermore, we want to limit ourselves to only 2 decimal places of precision. As such, i am tasked to use the function round(value, dp).
My task is to write two functions solve_qe_small(a, b, c) and solve_qe_large(a, b, c).

however, my following code presented a type error: "type complex doesn't define __round__ method"
I'm not sure how I can compute both complex numbers and at the same time round off the answers to 2 decimal places.

from math import *
from cmath import *
def solve_qe_small(a, b, c):
  d = (b**2) - (4*a*c)
  x1 = (-b - sqrt(d))/(2*a)
  answer1 = str(round(x1,2))
  return answer1

def solve_qe_large(a, b, c):
  d = (b**2) - (4*a*c)
  x2 = (-b + sqrt(d))/(2*a)
  answer2 = str(round(x2, 2))
  return answer2

print(solve_qe_small(1, 1, 8))
print(solve_qe_large(1, 1, 8))

[Gribouillis]

You could perhaps define your own round

def cround(z, ndigits=0):
    z = complex(z)
    return complex(round(z.real, ndigits), round(z.imag, ndigits))