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Math Help - factoring

  1. #1
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    factoring

    Sah...

    First off, how do I factor 8x^2+4x=0, I also need to factor for x here. Oh, and how do I do fractions in Latex?
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  2. #2
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    8x^{2}+4x=0

    4x(2x+1)=0

    x=0 , x=-\frac{1}{2}

    Fraction: \frac{1}{2} (check latex)
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  3. #3
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    8x^2 + 4x = 0

    4x(2x + 1) = 0
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  4. #4
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    firs thing you do is factor out the gcf 4x
    then set both factors equal to 0
    dose that help?
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  5. #5
    Member Jonboy's Avatar
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    don't you mean you're trying to solve for x?
    to factor, just pull out a gcf (greatest common factor) from both terms.


    by that, i mean say you have 9x^2 + 3x = 0

    Both have an x, so you can pull that out. and both are divisible by 3, so pull that out as well.

    Now you have: 3x(3x + 1) = 0

    So solve: 3x = 0 and 3x + 1 = 0


    to make fractions, put \frac{numerator}{denominator}
    downloading TeXaide will help you with typing with LaTex.
    Last edited by Jonboy; May 24th 2008 at 03:45 PM. Reason: absent minded latex mistake
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  6. #6
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    Lol ty all... I completly blanked...
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  7. #7
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    NEXT QUESTION! This is why I needed latex for fractions

     \frac{x^2+x-6}{x^2-x-2} * \frac{x^2+5x+4}{x^2+2x-3}
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  8. #8
    Member Jonboy's Avatar
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    factor everything that you can to try to cross cancel.
    remember, you can only do that on multiplication and division.
    NOT addition and subtraction.
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  9. #9
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    =] Ty!
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  10. #10
    Member Jonboy's Avatar
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    no prob, glad to be of assistance.
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