Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Need another confirmation

  1. May 5, 2005 #1
    while working on the quadratic formula in school ,i came across another formula,and wanted to know if its been derived since i got this from the quadratic formula.the formula is as follows
    [-b^3-2abc +or- sqrt(b^6-12a^2b^2c^2-16a^3c^3)]/(2ab^2+4a^2c).
    please i want to know if it works for all.
  2. jcsd
  3. May 5, 2005 #2


    User Avatar
    Science Advisor
    Homework Helper

    Are u asking whether

    [tex] \frac{-b\pm\sqrt{b^{2}-4ac}}{2a}=\frac{-b^{3}-2abc\pm\sqrt{b^{6}-12a^{2}b^{2}c^{2}-16a^{3}c^{3}}}{2ab^{2}+4a^{2}c} [/tex]

    ...?There's only one way to find out:CROSS MULTIPLY...:devil:

  4. May 5, 2005 #3
    looks like the multiplication of both the nominator and the denominator by
    [tex] b^{2}+2ac} [/tex]
  5. May 5, 2005 #4
    regardless of if it works or not the form on the right is highly useless.
  6. May 6, 2005 #5
    that was a hard thing to say inha, how useless is it ,i just came across it and felt like letting the forum know how correct it is and u call it useless.
    thae was a hard thing 2 say
  7. May 6, 2005 #6


    User Avatar
    Science Advisor
    Homework Helper

    I'm sorry not to share your disspointment,but it's nothing more than a waste of ink and paper (or server space)...

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Need another confirmation
  1. 1 quick confirmation (Replies: 2)