812 = 6561
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9 to the power of 2 = 81
11
81. (9 to the power of 2 = 9 x 9).
± 3 to the fourth power equals 81.
9^2 = 81 Which is the same as 9 * 9 = 81 For instance, if it was 9 to the power of 3: it would by 9 * 9 * 9 = 729 (could also be expressed as 9^3) (Note: x . * are three symbols meaning multiply.)