Q: Evaluate a to the second power times a to the negative second power for a equals 8?

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Negative 5 to the second power would be -5 times -5 which would be 25.

It equals 0. * * * * * Unless the question is (-x)2 + (+x)2. In that case, the answer is 2x2

8.04*10^-2 = 0.0804

Five to the negative 7th power equals 0.0000128

It doesn't. Negative one to an even power equals positive one. Negative one to an odd power equals negative one.

Seven to the negative four power equals 0.00041649312

Negative 4 to the third power equals -64

-1 to the power of four equals -1 times -1 times -1 times -1. -1 times -1 equals 1 (since a negative times a negative equals a positive). (1 to the power of 2) 1 times -1 equals -1 (since a negative times a positive equals a negative). (1 to the power of 3) -1 times -1 equals 1. (1 to the power of 4)

6 to the -2nd power = 1/366-2 = 1/62 = 1/36

(2)2

6 to the negative 8th power equals 5.9537418076512726718488035360463e-7