How do you simplify this (-4)^-12 * (-4) ^8
Use the fact that (a)^m * (a)^n = (a)^(m + n) ...and we have that...
(-4)^-12 * (-4) ^8 = (-4)^(-12 + 8) = (-4)^-4 = 1 / 4^4 = 1/256
