return _get_backend_mod().show(*args, **kwargs) TypeError: _Backend.show() takes 1 positional argument but 3 were given

You should check out matplotlib.pyplot.show() and .plot() documents to know how to use them correctly.

You should use plt.plot(x, y) instead of print(plt.show(x, y))

import matplotlib.pyplot as plt
import numpy as np

x = np.linspace(0, 10, 25)
y = x * x + 2
plt.plot(x, y)
plt.show()