Posted by **I REALLY NEED HELP, D:** on Thursday, February 2, 2012 at 10:35pm.

Simplify the expression. Write your answer using only positive exponents.

Explain as well.

1. (8x)^3*8^-4

2. 2x^-5*y^-3

3. (4x^4y^-3)^-2

4. 1/(3x)^-2

- Math -
**drwls**, Friday, February 3, 2012 at 1:45am
1. (8x)^3*8^-4 = 8^3*x^3/8^4 = x^3/8

4. 1/(3x)^-2 = (3x)^2 = 9x^2

Now you try the others. Get rid of negative exponents by moving those terms from numerator to denominator, or vice versa.

- Math -
**drwls**, Friday, February 3, 2012 at 2:11am
I see that Reiny already answered all the questions for you, when you posted earlier.

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