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Math Help - Evaluate and simplify f(b/3)

  1. #1
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    Evaluate and simplify f(b/3)

    Evaluate and simplify f(b/3)-problem1.1.jpgClick image to enlarge.
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    Super Member ILikeSerena's Avatar
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    Re: Evaluate and simplify f(b/3)

    Quote Originally Posted by Eraser147 View Post
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    Hi Eraser147!

    As a first step, can you replace each occurrence of x by (b/3)?
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    Re: Evaluate and simplify f(b/3)

    I don't know how to use the codes in the forum but it will look like this: b/3 + 8 over b^2/9 +2
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    Re: Evaluate and simplify f(b/3)

    Quote Originally Posted by Eraser147 View Post
    I don't know how to use the codes in the forum but it will look like this: b/3 + 8 over b^2/9 +2
    You asked for the code

    [TEX]\frac{\frac{b}{3}+8}{\frac{b^2}{9}+2}[/TEX] gives \frac{\frac{b}{3}+8}{\frac{b^2}{9}+2}
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    Re: Evaluate and simplify f(b/3)

    ^ Thankyou.
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    Re: Evaluate and simplify f(b/3)

    I see my problem now. I didn't multiply both sides the denominator of both the equation's numerator and demoninator.
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    Super Member ILikeSerena's Avatar
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    Re: Evaluate and simplify f(b/3)

    Good!

    Quote Originally Posted by Eraser147 View Post
    I see my problem now. I didn't multiply both sides the denominator of both the equation's numerator and demoninator.
    Uhh... so with what number are you multiplying both numerator and denominator?
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    Re: Evaluate and simplify f(b/3)

    \frac{\frac{b}{3}+8}{\frac{b^2}{9}+2} multiply 3 both top and bottom, and 9 both top and bottom.
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    Re: Evaluate and simplify f(b/3)

    Lastly, I simplify from {\frac{9b+216}{\frac{3b^2}{1}+54} which equates to {\frac{3b+72}{\frac{b^2}{1}+18}
    Last edited by Eraser147; October 6th 2012 at 03:16 PM.
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    Re: Evaluate and simplify f(b/3)

    Quote Originally Posted by Eraser147 View Post
    Lastly, I simplify from {\frac{9b+216}{\frac{3b^2}{1}+54} which equates to {\frac{3b+72}{\frac{b^2}{1}+18}
    It should be \frac{\frac{b}{3}+8}{\frac{b^2}{9}+2}=\frac{3b+72}  {b^2+18}
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  11. #11
    Super Member ILikeSerena's Avatar
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    Re: Evaluate and simplify f(b/3)

    You've got it!!
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