• Support PF! Buy your school textbooks, materials and every day products Here!

I need help with integration

  • Thread starter joseph9496
  • Start date
  • #1
1. Homework Statement

Hi everyone
im stuck with the following integration..

2. Homework Equations

integral of dx/(5-4x-(x^2))^(5/2)

3. The Attempt at a Solution

can anyone help me?
thanks
 

Answers and Replies

  • #2
tiny-tim
Science Advisor
Homework Helper
25,789
249
… complete the square … !

Hi joseph! :smile:

With quadratics, it's usually best to start by completing the square:

5 - 4x - x^2 = 9 - (x + 2)^2.

(And then you can even change to y = x + 2, dy = dx, if you like!)

Does that help? :smile:
 
  • #3
OH YEAH!!
i never thought of that!
thanks alot!
 

Related Threads for: I need help with integration

  • Last Post
Replies
15
Views
2K
  • Last Post
Replies
1
Views
985
  • Last Post
Replies
6
Views
1K
  • Last Post
Replies
1
Views
812
  • Last Post
Replies
14
Views
438
Replies
1
Views
785
Replies
3
Views
2K
  • Last Post
Replies
4
Views
1K
Top