Answer :
When the exponent is 0, it will always equal 1.
For example:
[tex]x^0=1[/tex]
[tex]3^0=1[/tex]
Since you know the values of m and n, substitute/plug it into the equation:
[tex]m^0-n^2[/tex] Plug in 2 into "m" since m = 2, and plug in -1 into "n" since n = -1
[tex](2)^0-(-1)^2[/tex]
1 - (1)
0 Your answer is B