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Thread: exam on wednesday for maths, need help on a question

  1. #1
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    exam on wednesday for maths, need help on a question

    hey simple ass for u guys, here it is

    "rearrange x^2-20x+500

    in the form

    (x-p)^2+q

    thanks

    jason

  2. #2
    MadMax's Avatar
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    well, think about it.

    Start with the (x-p)^2

    Expanding that out you're going to get x^2 - 2p*x + p^2

    Equate coefficients from one side to the other, and you can tell that p has to equal 10.

    From there, you have that (x-10)^2 = x^2 -20x + 100

    But you need 500 at the end, so obviously q has to be 400.

    So... x^2 - 20x + 500 = (x-10)^2 + 400

    Just think it through logically, and break it down into the simple things that you know how to do to begin with.


  3. #3
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    could someone write it on paper and scan it or photo it? like without thex^2 but with x2 witha a little 2

  4. #4
    MXM
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    Just wirte what MadMax wrote on paper yourself and think about it. It's pretty straightforward.

    Ok, here's a picture, should be pretty clear

  5. #5
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    THANKS SO MUCH!

    btw as u know iam 17 and this question seems v simple for a 17yr old doin maths..

    feel like tellin s story and stoping revison.

    so i;m un 12 and we take AS levels. if ur normal u do 4, whcih i am. i use to take business, design, psychology and IT

    however, lookin in to uni's, having maths is a major advantage if takin business.

    however, when i was doin gcse's i got a B, which is good enough to take standard maths in AS level, however i took the intermediate paper where i u miss out some stuff which is important so they forced me to take a 2 years AS course which means while ppl end up wit ha A level in 2 years, i only get a AS.

    but then having maths is adavantage so i guess it worth it.

  6. #6
    Lazier than Viper Renesis's Avatar
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    Dude you suck, I stopped doing maths more than a year ago but that was easy

  7. #7
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    o thanks, i'll always look to u for postivite comment u ***

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    SiR_dude's Avatar
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    Quote Originally Posted by Renesis
    Dude you suck, I stopped doing maths more than a year ago but that was easy
    Full of tact, aren't we??

  9. #9
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    Should we open a "do my homework for me"- topic?
    ____________________________

  10. #10
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    yes please

  11. #11
    MXM
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    We have one about homework already, Josty (or not) started it a while ago.


    EDIT: http://forum.finalgear.com/viewtopic.php?t=3108

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