SOLUTION: Need help on this question. Kind of confused on what is being asked. Can you please show work on this to see how to do these problems. Thanks for your help! Find the vertex of

Question 932055: Need help on this question. Kind of confused on what is being asked. Can you please show work on this to see how to do these problems. Thanks for your help!
Find the vertex of the function f(x) = -2x^2 - 12x +- 28. You�ll need to put it in the form of f(x)= a(x � h)^2 + k. Explain how you use this to find the vertex and how to graph the equation of the quadratic. What does �a� tell you? Describe the graph.
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
Use Completing The Square to put the function into the standard form which you want. Use the lessons,

What does Completing The Square Mean?
http://www.algebra.com/my/Completing-the-Square-Using-Pictures.lesson?content_action=show_dev
and
Using Completing the Square to Solve Quadratic Equation
http://www.algebra.com/my/Completing-the-Square-to-Solve-General-Quadratic-Equation.lesson?content_action=show_dev

The factor "a" either stretches or shrinks the parabola vertically; and if a<0, forces the parabola to open downward and have a vertex as a maximum. Your given function will be such a form.
RELATED QUESTIONS
The formula d = r x t is used to determine distance, d given the rate, r, and the time... (answered by nerdybill)

I need help on how to solve this answer! I just want to see the work so I know what to do (answered by ankor@dixie-net.com)

Hi you all I really need help with this question.....Scores on the Standford-Binet I... (answered by stanbon)

I need help. Please I am confused on how to solve this. Please show work. So I can learn. (answered by Fombitz)

Still kind of confused on Factoring. This problem I have an answer for but would like you (answered by josmiceli)

The following project uses the game of Guess Your Card. This is a game in which each... (answered by chessace)

okay. So i'm very confused and stuck on this problem. i really need help. here is the... (answered by ankor@dixie-net.com,nerdybill)

Hi i need help, i put my question as test because i didn't see the subject i need help... (answered by rothauserc)

Again please help. Asked question earlier but didn't get a response. 3) Suppose you... (answered by venugopalramana)