Top Posters
Since Sunday
t
7
m
6
k
6
F
5
j
5
t
5
j
5
G
5
f
5
a
5
d
5
c
5
Home Q & A Board Science-Related Homework Help Mathematics
New Topic  
leobato leobato
wrote...
Go to Answer
Posts: 10
Rep: 0 0
11 years ago
Determine the coordinates of the focus for the parabola y = 2x^2 - 8x + 3.
Read 318 times
2 Replies
Replies
wrote...
#1
11 years ago
Put the equation into vertex form.
y = 2x² - 8x + 3
y = 2(x² - 4x) + 3
y = 2(x² - 4x + (-2)²) - 2(-2)² + 3
y = 2(x - 2)² - 5
This is an up-opening parabola with vertex (2, -5) and focal length 1/(4·2) = ?.
focus (2, -5+?) = (2, -4?)
Answer accepted by topic starter
smooch92smooch92
wrote...
#2
Posts: 88
Rep: 0 0
11 years ago
Sign in or Sign up in seconds to unlock everything for free
1

Related Topics
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1040 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 173
  
 319
  
 294
Your Opinion
Who's your favorite biologist?
Votes: 587
Previous poll results: Which country would you like to visit for its food?