Calculation of input impedance with negative voltage feedback:
The input impedance with negative voltage feedback can be calculated using the formula:

Z_in = Z_in0 / (1 + Aβ)

where Z_in is the input impedance with feedback, Z_in0 is the input impedance without feedback, A is the open-loop voltage gain, and β is the feedback factor.

Calculation of output impedance with negative voltage feedback:
The output impedance with negative voltage feedback can be calculated using the formula:

Z_out = Z_out0 / (1 + Aβ)

where Z_out is the output impedance with feedback, Z_out0 is the output impedance without feedback, A is the open-loop voltage gain, and β is the feedback factor.

Given data:
- Input impedance without feedback (Z_in0) = 2 MΩ
- Output impedance without feedback (Z_out0) = 500 Ω
- Open-loop voltage gain (A) = not given
- Feedback factor (β) = not given

Assumptions:
To solve the problem, we need to assume the values of the open-loop voltage gain (A) and feedback factor (β). These values are not provided in the given data. Let's assume:
- Open-loop voltage gain (A) = 1000
- Feedback factor (β) = 0.01

Calculation:
Using the given data and assumptions, we can calculate the input and output impedances with negative voltage feedback.

Input impedance:
Z_in = Z_in0 / (1 + Aβ)
Z_in = 2 MΩ / (1 + 1000 * 0.01)
Z_in = 2 MΩ / (1 + 10)
Z_in = 2 MΩ / 11
Z_in = 181.82 kΩ

Output impedance:
Z_out = Z_out0 / (1 + Aβ)
Z_out = 500 Ω / (1 + 1000 * 0.01)
Z_out = 500 Ω / (1 + 10)
Z_out = 500 Ω / 11
Z_out = 45.45 Ω

Conclusion:
After negative voltage feedback, the input impedance is approximately 181.82 kΩ and the output impedance is approximately 45.45 Ω. These values are significantly different from the original values without feedback, showing the effectiveness of negative voltage feedback in reducing the input impedance and increasing the output impedance.