Help Algebra 2/Trigonometry Problem

  • Thread starter daodude1987
  • Start date
  • #1
daodude1987
I'm having trouble with proving this equation: x=-b\2a
I am not really familiar with this equation but my trigonometry teacher says it is something from Algebra 2. How can I prove why or how this equation works for finding the x-coordinate?
 

Answers and Replies

  • #2
Taking into account that its almost midnight, i think i can scrap together an answer.

you are talking about using a specific equation:

ax^2 + bx + c ( quadratic)

however you use this equation:

f(x) = a(x-h)^2 + k (to put it into an equation that will make it easier to find the vertex of the equation)

h = -b/2a
k = c - ah^2 ( im almost positive this is right)

the vertex will equal (h,k) so if the vertex liex on the x axis u will have an x coordinate of the graph. hope that helps some
 

Related Threads on Help Algebra 2/Trigonometry Problem

Replies
11
Views
2K
  • Last Post
Replies
7
Views
2K
  • Last Post
Replies
4
Views
2K
  • Last Post
Replies
5
Views
1K
  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
6
Views
1K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
3
Views
4K
  • Last Post
Replies
4
Views
5K
  • Last Post
Replies
4
Views
1K
Top