/sci/ - Science & Math

>>10682989
>a poor mans amphetamines

>>9287379

>>8684956

>>8658377
no more /pol/

>>7657012
Hahaha damn son

>>7648013
Depends where OP took the exam. An European 76% would be an American A just because of how inflated their grades are.

>>7190258
Drugs are for fun, don't read too much into your trip.

Ok, pay careful attention.
y= f(x)= -x^2+6x-15
y +15= -x^2 +6x
-y -15= x^2 -6x
-y -6= x^2 -6x +9
-y -6= (x-3)^2
-y= (x-3)^2 +6
y= -(x-3)^2 -6

from the general form
y= (x-h)^2+k
where the vertex is (h,k)
we find that
h=3
k=-6

there. I've solved it for you.
I recommend you improve your ability to manipulate things algebraically soon. Do not take this lightly, this is simple math. You should be focusing on mastering this and building on it like a foundation.

>>6994958
>quantum skeletons