SOLUTION: I am having trouble finding the Vertex of the quadratic equation of -0.2x^2 + 12x + 11 = 0 I have worked it to find that it has two solutions that being x = -0.90307428 and x =

Question 333583: I am having trouble finding the Vertex of the quadratic equation of
-0.2x^2 + 12x + 11 = 0
I have worked it to find that it has two solutions that being x = -0.90307428 and x = 60.90307428.
I am confused at how to find the vertex of the curve.
Thanks for any help.
Answer by jrfrunner(365) (Show Source): You can put this solution on YOUR website!
your quadratic equation is
---
the vertex can be found where x=-b/(2a) this comes from the quadratic solution for and its the front part of the quadratic solution.
--
so vertex (x,y) is where x=-b/(2a) and substituting this into to get the y part.
--
from
a=-0.2, b=12, c=11
--
x=-b/(2a)= -12/(2*(-0.2))=30
y=-0.2*30^2 +12(30)+11 = -180+360+11=191
vertex = (30,191)
===
you could have also worked
into the form by completing the square and in this form
the vertex would have been (h,k)

RELATED QUESTIONS
Hi. I am working on a problem finding the minimum and maximum value of f(x,y)=x-4y for... (answered by solver91311)

Dear Algebra.com tutors I am having a lot of trouble with graphing quadratic functions.... (answered by Alan3354,richard1234)

I am having problems finding the vertex of this problem.. could someone please help. (answered by jim_thompson5910)

I having trouble finding out whether these Quadratic Equations have one solution, two... (answered by MathLover1)

I'm having trouble with this problem it is 8x squared -16x+6=0. We are supposed to factor (answered by solver91311,erika514)

I am having problems with this problem as I am having a very hard time grasping the... (answered by Nate,lomlheather)

I am having problems with this problem as I am having a very hard time grasping the... (answered by stanbon)

Hello, I am having trouble with the following question. 'A frog jumps straight up off... (answered by rothauserc)

My book gives an example of an quadratic equation, but I do not understand how it has... (answered by jim_thompson5910)