2-2 = 1/4
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its 16, because the value of the power is even so the negative has no effect.
9 to negative 2 = 1/9 to plus 2 = 1/81
To express x to the power of negative 2 as a fraction, you can rewrite it as 1 over x squared. This is because any number raised to a negative exponent is equivalent to its reciprocal raised to the positive exponent. Therefore, x to the power of negative 2 is the same as 1 over x squared.