oh you wrote them on your hand did you?
yeah i usually, just do heaps of questions using that maths formula, or keep writing the formula till i remember it & then test myself using the write and check method
Aced Economics, Modern History and Legal Studies.
Adv English marks are ~ok, nothing to be pleased about.
Mathematics 3u marks were very poor.
Very worried about my incompetency in Mathematics :(
Prove the Identities:
A) (a+b+c)(ab+bc+ca)-abc=(a+b)(b+c)(c+a)
B) (ax+by)^2+(ay-bx)^2+c^2(x^2+y^2)=(x^2+y^2)(a^2+b^2+c^2)
How do I work these ones out?
Am I meant to just simplify LHS & RHS. And they will equal?
C) If 2x =a+b+c, show that (x-a)^2+(x-b)^2+(x-c)^2+x^2=a^2+b^2+c^2
Thanks in...
Got some questions I need help with:
A) If A and B are roots of 2x^2-2x-6=0, find the value of (A+1)^-1 + (B+1)^-1.
B) Factorise fully 1-64d^6f^6.
C) Solve 2tan x+1 =0 for 0_<x_<360 degrees.
D) Find the acute angle between y=2x-6 and x-3y+7=0. << are you ment to graph it to work it out...