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Thread: Homework help!

  1. #1
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    Homework help!

    Additional mathematics...

    Simutaneous equations:

    x-y+1/12=0,
    1/x-1/y-2=0

    Solve.

    Second question,

    Solve x^2=5+2/x, giving solutions to 2 decimal places where necessary.

    Please help... I'm desperate. Thank you.

    I want to know the working...
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  2. #2
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    BUMP!
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  3. #3
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    PLEASE!!!
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  4. #4
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    anyone!?
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  5. #5
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    Damn...
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  6. #6
    An Inconvenient Serving Size hurricaneone's Avatar
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    One of the members here, XU1, really likes to solve mathematics problems, you should PM him and ask for his help.
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  7. #7
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    but i need to hand this up tomorrow... damn
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  8. #8
    An Inconvenient Serving Size hurricaneone's Avatar
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    Originally posted by ealvintan
    but i need to hand this up tomorrow... damn
    Why don't you Google some maths forums?

    You surely can't do any worse than posting an algebra problem in a Flash development forum.
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  9. #9
    with simultaneous equations, solve for x in the first equation, plug it into the second equation, solve for y, plug into previous solution for x and check your answer.

    With quadratic equation either use the quadratic formula or complete the square to solve for x.

    if you can't understand me, then look it up in your algebra book.

  10. #10
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    Originally posted by yasunobu13
    with simultaneous equations, solve for x in the first equation, plug it into the second equation, solve for y, plug into previous solution for x and check your answer.

    With quadratic equation either use the quadratic formula or complete the square to solve for x.

    if you can't understand me, then look it up in your algebra book.
    for the first question, i came to -14=0... how come!?
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  11. #11
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    Hi,

    Post your problem on MathsNet forum and for sure you'll have your answer soon

  12. #12
    I don't know what you're doing, you should really be doing this on your own if you want to learn it.

    I'll give one last hint, though
    x = y-1/12
    y = x/(1-2x)

    Now, don't forget to show our work and how you got to what I just posted.

  13. #13
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    calpomatt, your working is wrong... you forgot to times x for -2

    nevermind...

    thanks for ur efforts anyway. i appreciate it
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  14. #14
    Ihoss
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    additional mathematic? in igcse? it will get harder

    x-y+1/12=0,
    1/x-1/y-2=0

    x=y-1/12
    1/(y-1/12)-1/y-2=0

    1-(y-1/12)/y-2(y-1/12)=0

    y-(y-1/12)-2y(y-1/12)=0

    1/12-2y^2-2y/12=0

    1-24y^2-2y=0

    24y^2+2y-1=0

    now use the quadratic formula to solve it. same with the next one

  15. #15
    Domo Arigato! Ultima Designs's Avatar
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    (Quadratic Formula)

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  16. #16
    Loop Junkie calpomatt's Avatar
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    Originally posted by ealvintan
    calpomatt, your working is wrong... you forgot to times x for -2

    nevermind...

    thanks for ur efforts anyway. i appreciate it
    Yeah...I caught that after I threw it up there. Hoped nobody saw it before I deleted it....damn you! I'm sittin here studyin for a crazy Fluid Mechanics final and here I am making simple algebra errors. I'm scared.

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