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Evaluate powers
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Learn it $a^n$ means $a$ multiplied by itself $n$ times, and $a^0 = 1$. Watch the brackets: $(-3)^2 = 9$ but $-3^2 = -9$ (only the 3 is squared).
Example: $(-2)^5$ and $-2^4$
- $(-2)^5 = -32$ (odd number of negatives → negative).
- $-2^4 = -(2^4) = -16$.
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