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: Simplify and express with positive indices, a little help?

  1. Jun 12, 2010 #1
    Simplify and express with positive indices, a little help?
    I am no good at these, can anyone show me how to work these out?

    (18x3 X 2x-4)/(4x-5 X 6x)

    83sqrt(p12 q-8) X 34sqrt(p-10 q9)

    and

    (6x+2 X 42x-4 X 35-x X 2x-6)/(124x+3 X 92x-3)

    ps. The Capital X's are multiplication signs
     
  2. jcsd
  3. Jun 13, 2010 #2

    Mark44

    Staff: Mentor

    Then, obviously, you need to work to get good at these.
    Review the properties of exponents (or indices, as you call them), especially these:
    [tex]a^m \cdot a^n = a^{m + n}[/tex]

    [tex]\frac{a^m}{a^n} = a^{m - n}[/tex]

    [tex](a^m)^n = a^{m \cdot n}[/tex]

    Also,
    [tex]\sqrt[n]{x} = x^{1/n}[/tex]
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook