Exponents are usually written like this: 3^2 means "3 to the second power".
Square roots are often written with sqrt in front, such as as sqrt(5)
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A square root is a number raised to the exponent (power) 1/2.
The rule is that you multiply the exponents. So if I have 2 squared and I want to raise it to the third power, you multiply the 2x3=6. When you multiply powers you add the exponents. When you raise exponents to a power you multiply. This works for rational exponents which can be used to represent roots as well.
Multiply them.
If you're multiplying numbers with exponents, add the exponents. 32 x 33 = 35 If you're raising exponents to a power, multiply the exponents. 3 squared to the third power = 36
Fractional exponents follow the same rules as integral exponents. Integral exponents are numbers raised to an integer power.