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I need the rule for dividing exponents

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3 Answers

Lauren explained it well. When dividing with exponents the rule is  xa/xb = xa-b. However, if you have a negative exponent you have to flip it. Such as x-a/x-b = xb/xa = xb-a.

Hope this helps you! Let me know if you have any additional questions :)

When you have xa/xb, the rule is xa-b. If you are referring to rational exponents, then you are actually talking about using the radical rules. For example x1/2 is actually the squareroot of x.


Hope this helps!

I'm not sure I understand your question. Do you mean the rule for things like this?


88/8

When you have numbers instead of variables, it is often easiest to simplify. In this example, 8/8 = 1, so the problem becomes

81

= 8

Here are some general exponent rules that might help you:

(ax)y=axy

For example;

(32)5 = 32•5=310

Here are some other general rules with numeric examples:

axay = ax+y

5752 = 57+2 = 510

1/ax=a-x

1/32 = 3-2

ax/ay = ax-y

64/63 = 64-3 = 61 = 6


If this doesn't help you with your question, perhaps you could try to ask it in a different way using the add comment button.

 

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