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Math Help - LaTeX -- Practice/Test

  1. #1
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    Lightbulb LaTeX -- Practice/Test

    Re: Multiplication w. Complex Number Involvement --

    (3\sqrt{-5})(-4\sqrt{-12})

    (3)(i\sqrt{5}) \times (-4)(i)(\sqrt{4 \times 3})

    (3i)(\sqrt{5}) \times (-4i)(2)(\sqrt{3})

    (3i)(\sqrt{5}) \times (-8i)(\sqrt{3})

    (-24)(i^2)(\sqrt{15})

     (-24)(-1)(\sqrt{15})

     24\sqrt{15}

    \sqrt{15} \approx 3.873

    24 \times 3.873 \approx 92.952

    So, (3\sqrt{-5})(-4\sqrt{-12}) \approx 92.952 . . .

    Ain't that sometin!! In a million years I would never have guessed that (3\sqrt{-5})(-4\sqrt{-12}) is equal to that.
    Complex numbers play "funny" tricks on old neurons! My parents should have started me on this when I was six! Maybe even three!
    Last edited by DeanSchlarbaum; July 9th 2010 at 08:20 PM.
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  2. #2
    Rhymes with Orange Chris L T521's Avatar
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    Quote Originally Posted by DeanSchlarbaum View Post
    Re: Multiplication w. Complex Number Involvement --

    [tex](3\sqrt{-5})(-4\sqrt{-12})[\math]

    [tex](3)(i\sqrt{5}) x (-4)(i)(\sqrt{4x3})[\math\

    [tex](3i)(\sqrt{5}) x (-4i)(2)(\sqrt{3}) [\math]

    [tex](3i)(\sqrt{5}) x (-8i)(\sqrt{3})

    [tex](-24)(i^2)(\sqrt{15})[\math]

    [tex] (-24)(-1)(\sqrt{15})[\math]

    [tex] 24\sqrt{15}[\math]
    It should be [tex][/tex], not [tex][\math]; hence why your code was not compiled into the images.
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  3. #3
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    Quote Originally Posted by Chris L T521 View Post
    It should be [tex][/tex], not [tex][\math]; hence why your code was not compiled into the images.
    Chris: Thank you. However, I figured that out (somehow) by myself before I saw your reply to my Post. When I first joined MHF I printed a Post titled "LATEX on MHF." In it it shows the bracketed "math" with BOTH forward facing and back facing slashes. I think the newer tutorial corrects that. Again, thanks -- I am new to Forum, right now formating formulas with LaTeX seems very cumbersome and difficult, and I need all the help I can get!
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