If the m-sup2; - 3 power of (m-2) x = 5 is a one variable equation of first degree, what is the value of M? If we calculate by M & sup2; - 3, m should be equal to 2, but it is contradictory to m-2 ≠ 0?

If the m-sup2; - 3 power of (m-2) x = 5 is a one variable equation of first degree, what is the value of M? If we calculate by M & sup2; - 3, m should be equal to 2, but it is contradictory to m-2 ≠ 0?

M = plus or minus 2, rounding off the positive