Use power rules (no calculator) to evaluate the following expression.

Question

Use power rules (no calculator) to evaluate the expression  for x = –8, y = 2, n = –1.

Please be clear and concise. And format your answer neatly! Thank you! :D

Answer 1

(x^3)^n times y^-n times x^y

where x=-8 y=2, n=-1

plug the values into the given (x^3)^n)(y^-n)(x^y) to get

(-8^3)^-1 times y times -8^2

1/-8^3 times y times (-8)^2

= 1/(-8)^3 x 2^(-(-1)) x (-8)^2

= -(1/64(8)) x 2 x 64

= -1/4

=-0.25

Answer 2

((-8)³)^-1(2)^-(-1)(-8)^-1

(-8)^-3(2)(-8)^-1

(-8)^-4(2)

Can you clearly and concisely conclude and answer?