Question

F(X)=-X^2+18X-86 FIND THE MIN OR max

Answer 1

put it in vertex form

Answer 2

What mathematics are you in?

Answer 3

I think you can also solve this using second derivative test.

Answer 4

college algebra 1

Answer 5

I don't have to do the quadratic find the square?

Answer 6

Sorry. What I told you is for higher math. Haha. I think you can just find it by finding its roots.And just graph it to check whether it is max point of min point. :)

Answer 7

If you remember the formula I gave you for vertex, it is x coordinate of vertex = -b/2a
So find -b/2a first

Answer 8

Or if you were taught to do it by completing squares you can do it that way too.

Answer 9

you can use the quadratic formula. And the min max will be mid way between the 2 roots