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Math Help - Simplify each expression as far as possible...

  1. #1
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    Simplify each expression as far as possible...



    I am having trouble with these problems, I was told to practice this for my next quiz that I am going to have but on our crunch course (5 week) the guy doesen't explain anything and so I really don't get it.

    Can someone help me out?

    I am suppose to Simplify each expression as far as possible. Write my answer using positive exponents only. (I usually use 3 to verify my answer)

    Thanks
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  2. #2
    Super Member malaygoel's Avatar
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    Quote Originally Posted by elitescouter View Post


    I am having trouble with these problems, I was told to practice this for my next quiz that I am going to have but on our crunch course (5 week) the guy doesen't explain anything and so I really don't get it.

    Can someone help me out?

    I am suppose to Simplify each expression as far as possible. Write my answer using positive exponents only. (I usually use 3 to verify my answer)

    Thanks
    1. (3x)^{-3}
    = \frac{1}{(3x)^3}
    = \frac{1}{3^3 x^3}
    = \frac{1}{27 x^3}

    again 1st
    1. (3x)^{-3}
    = 3^{-3}x^{-3}
    = \frac{1}{27}\frac{1}{x^3}


    7. 3x^{-2}(x^8+2x^2)+ 2(x^3)^2
    = 3x^{-2}.x^8+3x^{-2}.2x^2+2.(x^3)^2
    ............... (x^a)^b=x^{ab}
    ............... x^a.x^b=x^{a+b}
    = 3x^6+3.2x^0+2.x^6
    = 3x^6+6+2.x^6
    = 3x^6+2.x^6+6
    = 5x^6+6

    Try others...and tell whether you get them or not...and the above ones as well
    Last edited by malaygoel; June 30th 2009 at 06:05 PM. Reason: Latex syntax mistake
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