(-2/5)3 = - 0.064
-2 / (53) = - 0.016
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a3*a-2 = a(3-2) = a
That is the definition of negative powers.
(-2)(2^3) = (-2)(8) = (-16)
6 to the negative 2nd means that it equals 1 over 6 to the negative 2nd.
it is a positive fraction 5^-2=1 over 5^2 answer is 1 over 25