In math, a power is the answer that you get when you multiply a number by itself. This answer can also be called a product.
For example, the answers that you get for multiplying 5 x 2 x 3 x 6 and 5 x 5 x 5 x 5 are called products. However, when the numbers in the multiplication are the same such as in 5 x 5 x 5 x 5, we call the answer for 5 x 5 x 5 x 5 a power instead of a product.
Notice that 5 x 5 x 5 x 5 = 5^{4} = 625
625 is the answer or power. Since 625 is also equal to 5^{4} and 5 x 5 x 5 x 5, it is OK to call 5 x 5 x 5 x 5 and 5^{4} powers as well.
Therefore, 5^{4} is a power and you read the expression 5^{4} as " five to the fourth power."
As you may have noticed, a power can have two parts, a base and an exponent.
1. 3^{5}
2. (-2)^{10}
3. (4x)^{3}
4. (2x + 1)^{2}
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