If 2m ‐ 4 and 3M ‐ 1 are the square roots of the same number, then M is equal to

If 2m ‐ 4 and 3M ‐ 1 are the square roots of the same number, then M is equal to

If 2M and 3M are the square roots of the same number, then M is equal to
The sum of the square roots of the same number is 0