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Here are my Prelim ranks. My school rank is 200ish English Adv: 64/101 Math: 3/75 Math Ext: 2/25 Physics: 4/25 Economics: 2/25 Legal Studies: 8/75 SOR 1 unit: 13/102

lol, (h +q) (x - 2ah) equals x(h +q) + -2ah(h +q) which equals x(h +q) -2ah^2 - 2aqh this is really really simple expansion

the right hand side of the second line is: (h + q) (x - 2ah) By expansion, that becomes: hx + qx - 2ah^2 - 2aqh that can simplify to x(h + q) - 2ah^2 - 2aqh, which is the third line, right hand side :)

haha yeh no worries, I'm not real sure how to simplify my answer any further though, if it's possible... (probably is)

haha thanks guys :D

4PA^2 = 9B^2 4(X^2 + 12X + Y^2 -10Y + 61) = 9(X^2 - 6X + Y^2 + 2Y + 10) 4X^2 +48X +4Y^2 -40Y +244 = 9X^2 -54X +9Y^2 +18Y + 90 5X^2 -102X +5Y^2 +58Y - 154 = 0 Thats the answer :)