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This question might be written two different ways resulting in two different answers. It depends on how, exactly, it is written:
(-3)^2 (the symbol ^ indicates the power)
= -3 x -3
= 9
OR
-(3)^2
= - (3 x 3)
= -9
If there are no brackets on the question at all then I would assume that the second one is the correct one.
3-2 = 1/9 or one ninth. Expressed as a decimal, this is equal to 0.1 recurring (that is, 0.1111...)
1 over 3 to the negative 2nd power is 9
43 times 32 = 576
4 to the 2nd power times 3 to the fifth power
3/4= to 2nd power
676