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exam on wednesday for maths, need help on a question

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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
    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.

    Comment


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

      Comment


        #4
        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

        Comment


          #5
          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.

          Comment


            #6
            Dude you suck, I stopped doing maths more than a year ago but that was easy

            Comment


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

              Comment


                #8
                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??

                Comment


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

                  Comment


                    #10
                    yes please

                    Comment


                      #11
                      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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