This is different from Rule 1, because here there is one base raised to two powers, and in Rule 1, there were two bases raised to two powers. If an exponential expression is itself raised to a power, multiply the exponents together. The expression 0 0 works a little differently, but you don't deal with that until calculus. In addition, anything (except 0) raised to the 0 power equals 1 (x 0 = 1, 12 0 = 1).
(-2) to get 4 and then multiply that result by the next -2, and that result by the next -2 until you're finished. Just go left to right, and multiply two numbers at a time. Don't stress out about the negative signs. Solution: In this case, the base is -2, so it should be multiplied by itself 5 times. To find the answer, multiply 4 by itself 3 times: Solution: In this expression, 4 is the base and 3 is the exponent. To find the value of real numbers raised to exponents, just multiply the large number attached to the exponent (called the base) by itself the indicated number of times.Įxample 2: Evaluate the exponential expressions. In the language of algebra, x3 (read " x to the third power") means " x multiplied by itself three times", or x Basically, an exponent is a shorthand way to indicate repeated multiplication. 
The role of an exponent is to save you time and to clean up the way expressions are written.
In the exponential expression y 4, 4 is the exponent and y is the base.
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