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Q: What is negative nine to the second power?

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

0.0000000099

1

-3^2 = 9 -(3^2) = -9

10 to the second power is the inverse of 10 to the negative second power. 10 to the 2nd power is 100 so the inverse of 100 is 1/100 or .01 so 10 to the negative second power is written as 10-2 which is equal to 1/100 or 0.01.

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9-2 = 1/92 = 1/81

Just X to the second power minus nine. You can't subtract nine from x to the second power unless you know what x is.

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

0.0000000099

negative eight plus two times four to the second power

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1