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8^2 = 64 The exponent is 2
It is: 21a exponent 6
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Squared implies exponent = 2.
A negative exponent is the same as 1/(the positive exponent). For example, 2^3 is (2*2*2) = 8. 2^(-3) is 1/(2*2*2) = 1/8. So, just calculate the positive exponent version, and put it under 1.