A negative exponent becomes positive in the reciprocal.
So if you have a number a^x where x is negative, then,
a^x = 1/(a^-x) and, since x is negative, -x is positive.
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22=
A base raised to a negative power is equal to 1 divided by that base raised to a positive exponent. So 16 raised to (-3/2) is equal to 1/ (16 raised 3/2), or 1/64.
First: You don't want any negative exponents. I'll give two examples- 5^-2 / 5^2. What you would do is switch the negative exponent to the other side, changing the negative exponent to a positive, and if there's nothing there, replace it with a one. So, now you have 1/ 5^2 * 5^2. Simplify 1/ 25 * 25 1/625. There's your answer. With variables: x^2 / y^-3. Switch the negative to a positive, placing it on the other side. Since the denominator becomes one and all you have are numerators, the denominator isn't needed (but you can still use it while learning the concept). x^2 * y^3. A fully simplified answer. I hope this helps!
2+2 = 2*2 = 2^2 all simplify to 4. But there is no special name for the three expressions.
Why is it important to simplify radical expressions before adding or subtracting? How is adding radical expressions similar to adding polynomial expressions? How is it different? Provide a radical expression for your classmates to simplify..