Formulas..!!

tis was random.. came out wif a simple one during the last nite of maths revision..

something like tis:

u happy = i happy.

:. u happy jiu hao..

:)

after tat, Ying Tong commented and inspired me.. she says sometime, you happy =/= i happy.. but still, u happy jiu hao.. so came out wif another..

Let x = uhappy,

y = ihappy

(x - y )(x + y) = 0 ; where x > 0

:. x = y or x = -y

Sub. x and y into eqtn,

uhappy = ihappy or -ihappy

Since x > 0,

:. uhappy = ihappy

:)