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Re: 2012 Year 9 &10 Mathematics Marathon Finally on question 1 g :')

Re: 2012 Year 9 &10 Mathematics Marathon wait so is the answer for that plusminus 2 and 1?

Re: 2012 Year 9 &10 Mathematics Marathon -_-

Re: 2012 Year 9 &10 Mathematics Marathon oh my god i can't even :cry:

Re: 2012 Year 9 &10 Mathematics Marathon Wait did I do question f correct? m^4 - 5m^2 + 4 = 0 m^4 - 5m^2 = -4 m^2 (m^2 - 5) = -4 m^2 = -4 (no solution) m^2 - 5 = -4 and then solve for m? failing this hard

Re: 2012 Year 9 &10 Mathematics Marathon Ohhhhhhhhhhh holy crap I get it. Wow I'm already failing this test (legit) and i'm only one question in LOL

Re: 2012 Year 9 &10 Mathematics Marathon What is the 'discriminant' and yes you can factorise x^2 + x -2 = 0? :s isn't it (x+2) (x-1)?

Re: 2012 Year 9 &10 Mathematics Marathon Well it's already in the ax + bx + c form so why would we need to complete the square to find the minimum lmao

Re: 2012 Year 9 &10 Mathematics Marathon I had a positive 2... Or maybe i'm just blind.

Re: 2012 Year 9 &10 Mathematics Marathon idgi So the question gives you an equation. You factorise it and then you have to expand it again which gives you the same equation but the constant with a negative. If I factorise the new equation, I still get the same thing. I'm going in circles here.

Re: 2012 Year 9 &10 Mathematics Marathon wait expand the second line? :s what about it?

Re: 2012 Year 9 &10 Mathematics Marathon ??? x^2 + x + 2 = 0 (x+2) (x-1) = 0 x = -2, 1 There are roots.

Re: 2012 Year 9 &10 Mathematics Marathon for question e, there are roots? :S

Re: 2012 Year 9 &10 Mathematics Marathon okay sweet because i thought i was the only one who got a no solution

Re: 2012 Year 9 &10 Mathematics Marathon So far i cant do question 1 a part 2, question c and question d and it's only question 1 it's suppose to be easy >ok

Re: 2012 Year 9 &10 Mathematics Marathon wait guys for questoin one c, when completing the square, did you get (x-4)^2 = -9? or am i the only one who got a negative and you can't square root a neg

Re: 2012 Year 9 &10 Mathematics Marathon its a function

Re: 2012 Year 9 &10 Mathematics Marathon thanks smarty

Re: 2012 Year 9 &10 Mathematics Marathon oh well skip

Re: 2012 Year 9 &10 Mathematics Marathon um so i cant do the question one part 2 WTF IS THIS