1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: A basic algebra question (no calculator)

  1. Apr 18, 2012 #1
    1. The problem statement, all variables and given/known data

    Simplify 3√-27x^6

    I'm very confused on how to evaluate what -27^(1/3) is without a calculator. I think I'm fine with the other steps. if someone could explain this to me I would really appreciate it.



    3. The attempt at a solution
    = 3√-27x^6
    = (-27x^6)^(1/3)
    = -27^(1/3)x^2
     
  2. jcsd
  3. Apr 18, 2012 #2
    [itex]-27^\frac{1}{3} = -3^{3*\frac{1}{3}}[/itex]
     
  4. Apr 18, 2012 #3
    oh I get it now thanks a lot :)
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook