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Math Help - Need help with this equation transformation

  1. #1
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    Question Need help with this equation transformation

    Hey man

    I have starred on this equation extremely long time, and i just cant get it why this is true (or how it is done) :






    I really hope someone could help me and show a complete step by step on how its done.
    Thanks alot :-)
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  2. #2
    Super Member ILikeSerena's Avatar
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    Re: Need help with this equation transformation

    Hi Assassinbeast!

    A fraction remains the same if you multiply numerator and denominator both by the same number.

    And when you want to add fraction, you first have to make the denominators the same, and then you can add the numerators.

    In your case:

    \frac{b^2}{4a} - \frac{b^2}{2a} + c

    = \frac{b^2}{4a} - \frac{b^2 \cdot 2}{2a \cdot 2} + c \cdot \frac {4a}{4a}

    = \frac{b^2}{4a} - \frac{2 b^2}{4a} + \frac {4ac}{4a}

    = \frac{b^2 - 2 b^2 + 4ac}{4a}
    Thanks from Assassinbeast
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  3. #3
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    Re: Need help with this equation transformation

    wwoowowowowow!!!! thaaanks you sooooo much man!!!!
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