simplifying expressions w/ zero, negative exponents

Mathgirl22

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Jan 30, 2008
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2
OK I really don't get it !!Help !!

Here are a few examples of my problems !!!

Simplify

8a(-3)b(2)c(-2) * ()= Exponent

xy(-3)

Write as a decimal
10(-5)

Simplify
3m(-4)/n(-8)
 

Loren

Senior Member
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Aug 28, 2007
Messages
1,299
You need to review the Rules of Exponents. Among them will be the definition for a term with a negative exponent. It will be something like ...

\(\displaystyle a^{-x}=\frac{1}{a^x}\).

Example:

\(\displaystyle \frac{a^{-3}b^2}{c^{-4}}=\frac{b^2c^4}{a^3}\)

...if you want to have all positive exponents.
 

Mathgirl22

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Jan 30, 2008
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I get it after talking to my friend in trig sooo loike xy(-3) Would be x over y raised to the 3rd power right ????
 

stapel

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Feb 4, 2004
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Mathgirl22 said:
I get it after talking to my friend in trig sooo loike xy(-3) Would be x over y raised to the 3rd power right ????
I'm not sure what the above means...?

If you are referring to the second of your four originally-posted exercises, and if you are asking if \(\displaystyle \frac{x}{y^3}\) is the correct simplification, then the answer would be "yes".

If you mean something else, please reply (in standard English) with clarification. Thank you! :D

Eliz.
 
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