Simplify use only positive exponents in your final answers

(-3x^2y)^3 (-3x^-3y)^2

(5a^-1b^2)^-2 / 125a^5b^-3

(8x^6y^-3)^1/3 / (2xy)^3

Any help would be greatly appreciated

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- Apr 23rd 2008, 02:21 PMTH1Need Help Exponents Due Tomorow
Simplify use only positive exponents in your final answers

(-3x^2y)^3 (-3x^-3y)^2

(5a^-1b^2)^-2 / 125a^5b^-3

(8x^6y^-3)^1/3 / (2xy)^3

Any help would be greatly appreciated - Apr 23rd 2008, 02:23 PMMathstud28
- Apr 23rd 2008, 02:29 PMTH1
No since the variable y isn't suppose to be an exponent but I meant everything else

- Apr 23rd 2008, 02:35 PMMathstud28
I will show you all the tools then

YOU apply them

It will help you learn

using this last definition in conjunction with the second one we can see that

Apply those..not all are used...it is up to you to figure it out...if you have any specific problems post them and we will help

Good luck - Apr 23rd 2008, 02:37 PMMoo
Hello,

Applying the formulas : and

You should get the answers.

Can you calculate the followings ? - Apr 23rd 2008, 02:40 PMTH1
Would the final answer be 243y^5 and what about the rest of the other questions

- Apr 23rd 2008, 02:42 PMMoo
There's a - sign missing...

It would be exactly the same method for the followings.. - Apr 23rd 2008, 03:14 PMTH1
For the last one how would you do that one since the exponent is a fraction and for the second one would the answer be 25a^3b

- Apr 23rd 2008, 03:27 PMMathstud28
- Apr 23rd 2008, 04:08 PMTH1
I dont understand what you wrote since for the last one the exponent is 1/3 and I dont know what to do for that part

- Apr 23rd 2008, 04:10 PMMathstud28
- Apr 23rd 2008, 04:18 PMMathstud28
See if this helps

http://www.mathhelpforum.com/math-he...tml#post134788 - Apr 23rd 2008, 04:30 PMTH1
For the exponent 1/3 i know you have to evaluate it but when you evaluate it on 8 would it be 8/3 or would you simplify 8 as a power of 2^3 and the answer be 2 since the 3 cancels out

2^3 1/3 - Apr 23rd 2008, 04:33 PMMathstud28
- Apr 23rd 2008, 04:40 PMTH1
Thanks I have another question

if x=1/2 evaluate the expression (-2x^-2)^3(6x)^2/ 2(-3x^-1)^3

I have evaluated part of it without substituting x=1/2 and I have

(-8x^-6)(36x^2)/ 2(-27x^-3) so what do I do from there