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Just got mine and I did..average I guess? Hahaha! Stuffed up business =[ Nevertheless, here it is: Maths Extension 1 : 89% --> 11/61 Physics: 89% --> 2/42 English Advanced: 91% --> 17/99 English extension 80% --> 11/33 Economics: 94% --> 4/43 Software Design: 84% --> 3/11 Business Studies: 80%...

So you can test out new ideas and techniques so you can figure out what's right and what's not for you in year 12.

yeah, did that during term 1 studying dracula, and now currently doing postmoderism at the same time as doing our major research project on anything we want.

Dropping software design and development and english extension, and picking up 4U maths. The bad thing about my school is that our HSC and Prelim require one more unit, so I've got 14 unit for Prelim (13 lowest) and because of it, the lowest I could do in the HSC is 12, instead of 11 if prelim...

Took up Software Design and Development and it's fricken confusing! I'm like counting every second for the class to end! should've picked up chemistry or bio instead. So much easier and understable! But since my SDD teacher was nice to me (cause he taught me IST last year) I decided to stay...

Currently up to chapter 5 of the 3U Cambridge Book - Coordinate Geometry.

Hi, our school is currently using the "Physics In Focus" textbook but I'm searching for another one for extra reading or something. In addition I have a pretty crap physics teacher so I'm trying to find a good textbook which I can understand clearly and use together with "Physics in Focus."...

Yellow is faster because it's refracting at an angle less than green, hence faster. The greater the angle, the slower (greater the change) the light will travel at. Incase you doubt me or want a source: http://www.optics4kids.com/teachersparents/articles/refractionoflight.html Search "The...

Nope, it's xy. It's page 78 question 23, if you have the cambridge 3U book.

Is everyone starting their Area of study already? Do most school spend all their preliminary doing their area of study? My school doesn't start until like term 2! Is that normal?

Well sony, since there isn't a PRELIMINARY maths forum, thus it has to be posted here. Let it be posted here because it separates the HSC questions from preliminary questions.

there's another thread for it, he doubled posted so ask your question on the other one cause that one has 10+ posts already.

(x+2)^2 + (y-1)^2 = x^2 + 4x + 4 + y^2 - 2y + 1 Rearrange. =x^2 + y^2 + 4x - 2y + 1 + 4 since x^2 + y^2 + 4x - 2y + 1 = 0 = 0 + 4 = 4 My question Prove that x^2 + xy + y^2 > 0 for any non-zero values of x and y

omg genius! How did you know what to let x and y be? Do you just look at it and just get it magically? Thanks very much for the help =]

|2x-1| = |x+4| (2x-1)^2 - (x+4)^2 = 0 difference of 2 squares [(2x-1)-(x+4)] [(2x-1)+(x+4)] = 0 (x-5)(3x+3)=0 therefore x = 5 or x = -1 there's also another way to do it but it's longer.

The American Dream? ==" Seems like we're the only one doing it.

Oh i forgot :L but I edited it but I'll post it again after this answer: 25x^2 = 81 Square root both side..imagine it as Square root 25 x square root x^2 = square root 81 5x = +- (positive negative) 9 therefore x = 9/5 or -9/5 "In the notes it was proven that x^2 + y^2 >= (large than or equal...

(x+2)^2 + (x-1)(x-7) = 17 Now Expand... x^2 + 4x+ 4 + x^2 - 8x + 7- 17 = 0 Simplify. 2x^2 - 4x - 6 = 0 (2x-6)(x+1) = 0 Therefore x = 3 or x = -1 Okay, my turn. "In the notes it was proven that x^2 + y^2 >= (large than or equal to) 2xy. Use this result and appropriate substitutions to prove...

I do 14 :haha: It depends on your timetable at school and how many periods per day. wow, how can you do 10 in year 11, unless you accelerated? Hahaha

Hmmm, if you're planning to do the IB, you'll have to be an independent worker and this requires high organisation skills.Also, teachers will expect you to do your own work. Usually, most people who are quite talented, eg achieving high marks in year 10 in a range of subjects, are capable of...