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

2 Answers
Feb 10, 2017

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

Feb 10, 2017

2^2/r^3

Explanation:

4r^-3

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

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

:.=2^2/r^3