Question

How do you simplify `4r^-3` and write it using only positive exponents?

Answer 1

Use this rule for exponents: `x^color(red)(a) = 1/x^color(red)(-a)`

`4r^color(red)(-3) = 4/r^color(red)(- -3)= 4/r^3`

Answer 2

`2^2/r^3`

Explanation:

`4r^-3`

using positive exponents:
^`:.=4*1/r^3`

`:.=2^2*1/r^3`

`:.=2^2/r^3`