KK1

原帖由 myversa 於 2008-4-30 07:54 發表
f(x^2 - 2) - g(x - 5)
((x^2 - 2) - 5) - ((x - 5)^2 - 3)
x^2 - 7 - (x^2 - 10x + 25 -3)
x^2 -7 - x^2 + 10x - 25 + 3
10x - 29

???

I do not know... I have not touched math for more than 10 years other  ...

you're correct!