The square of a rational number is one ninth. What is its cube?

The rational number is one third, and the cube is one 27th

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2. There are several negative numbers in the cubic power of - 2 (- 1), the quadratic power of - 2, - the cubic power of - 2, - the 2nth power of (- 4), (- 3) 2N-1 N is a positive integer
3. 1、 1. The product of two numbers is a positive number, both of which are positive numbers () 2. Any power of a negative number is a negative number () emergency
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6. What's the matter with a minus sign before the absolute value sign? For example: | 56 | =? If it is | + π | =? Thank you!
7. The absolute value is 5:1, the sign is negative, the number is?
8. If it is less than 0, the absolute value will be removed and a negative sign will be added in front of it
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10. A number with a negative sign is a negative number ~ ~ ~ simple explanation~
11. How many rational numbers are there with square equal to four ninths? What are all those numbers?
12. How many rational numbers are there for square to get 4 / 9? Are there any rational numbers for square to get - 4 / 9?
13. The rational number with square 81 is______ The number whose reciprocal equals itself is______ ．
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15. The root sign X-2 and (y + 1) are opposite to each other, so we can find the Y power of X
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17. The people's education press has known that a = a + the quadratic power of a + the cubic power of a +. + the 100th power of A (1) When a = 1, find the value of the second power of A (2) When a = - 1, find the value of A (3) When the absolute value of a = 0, find the value of the sixth power of a + half the second power of a + 7
18. There is a set of numbers, the first is - (A's Square), the second is (A's fifth power / 2), the third is - (A's eighth power / 3), the third is - (A's fifth power / 2)
19. If the rational numbers x and y satisfy the quadratic power of | x + Y-3 | + (X-Y + 1) = 0, find the quadratic power of (x multiplied by the quadratic power of Y) multiplied by the quadratic power of (x multiplied by the quadratic power of Y) Value of
20. Given that a B is a rational number, and the square of (a + √ 3) is B, the value of B to the power of a is obtained