Posted by **tara** on Thursday, February 14, 2008 at 10:20pm.

if you have a problem where you are multiplying numbers with exponents (both positive and negative) and your answer ends up with a negative exponent what is the reason you make a fraction out of it and put it on the bottom as a positive?

why cant you have a negative exponent in an answer?

- college algebra -
**drwls**, Thursday, February 14, 2008 at 10:28pm
You are right. You can write the answer either way.

For example, if a and b are both positive,

x^a*x^-b = x^(a-b) or 1/x^(b-a)

- college algebra -
**tara**, Thursday, February 14, 2008 at 10:48pm
but why cant there be a neg. on top? why do u move it to the bottom and make it positive?(note:neg6,5,2 and 4 are exponents)

(4a-6b5)(7a2b4)= 28a-5b9

the final answer will be 28b9

over

a5

my question was why do you move the "a" negative 5 to the bottom and make it a postive "a" 5

I hope i'm wording this right.

- college algebra -
**drwls**, Friday, February 15, 2008 at 1:32am
You can. Just move the exponent up or down between numerator and denominator and change the sign. It's the same number either way.

## Answer This Question

## Related Questions

- algebra - need help please!!!!! (fraction) _____1____ 9x^-2 y^-1 I'm not exactly...
- algebra - Simplify using only positive exponents. (2r^-1s^2t^0)^-2...
- algebra - Simplify. Do not use negative exponents in the answer. 12x-2y4 -3xy-7 ...
- Algebra II - Working on my online math homework, I encountered this problem: ...
- math , algebra - Can someone correct these (1) -5^2-3 25-3 22 (2) The sum of m ...
- Math - ^=exponents /= divide So I am not sure how to do this. It is an example ...
- math - ms.sue help asap 1. which exponent makes the statement true? 1/5^9 =5^? 9...
- Math - We are adding positive and negative numbers. The question is State ...
- math - Instructions: Tell whether each expression represents a positive number ...
- Chemistry(Please check answers) - 1) For a reaction delta Go is more negative ...

More Related Questions