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Thread: Simplify an expression.

  1. August 24th 2011, 08:40 AM #1
    trishakatz
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    Simplify an expression.

    16-64x(squared) / 8x-4
    Last edited by mr fantastic; August 24th 2011 at 09:49 PM. Reason: Title.
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  2. August 24th 2011, 08:43 AM #2
    Plato
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    Re: Please help me simplify this expressionn please?

    Quote Originally Posted by trishakatz View Post
    16-64x(squared) / 8x-4
    \frac{16-64x^2}{8x-4}=-\frac{64x^2-16}{8x-4}=-\frac{(8x-4)(8x+4)}{(8x-4)}
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  3. August 24th 2011, 09:37 AM #3
    HallsofIvy
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    Re: Please help me simplify this expressionn please?

    The first thing I would have done is factor out common numerical factors: 16 divides both 16 and 64: 16-64x^2= 16(1- 4x^2) and 4 divides both 8 and 4: 8x- 4= 4(2x- 1) so the fraction becomes \frac{16- 64x^2}{8x-4}= \frac{16(1-4x^2)}{4(2x-1)}= 4\frac{1- 4x^2}{2x- 1}= 4\frac{(1- 2x)(1+2x)}{2x-1}
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