Completing the Square (Quadratic Equations)

Loading...

Sign in or sign up now!
Alert icon
Upgrade to the latest Flash Player for improved playback performance. Upgrade now or more info.
3,216
Loading...
Alert icon
Sign in or sign up now!
Alert icon

Uploaded by on Jan 16, 2011

Solving Quadratic Equations by Completing the Square.

Steps:
1. Factor a out of the first two terms.
2. Add (b/2)^2 in the parentheses and a*(b/2)^2 on the right side.
3. Rewrite with (x+b/2)^2
4. Simplify.
(5. Solve)

  • likes, 3 dislikes

Link to this comment:

Share to:
see all

All Comments (8)

Sign In or Sign Up now to post a comment!
  • i bet you I'm the only kid thats in seventh grade doing this.

  • Thank youuuuuuuu! I LOVE YOU

  • ax²+bx = -c

    add 4a to both sides

    add b² to both sides

    factor left part

    solve for x

  • x = ( -b +- sqrt(b^2 - 4ac) ) / 2a

  • Very Similar to Khan Academy.

    I love it!

Loading...

Alert icon
0 / 00Unsaved Playlist Return to active list
    1. Your queue is empty. Add videos to your queue using this button:
      or sign in to load a different list.
    Loading...Loading...Saving...
    • Clear all videos from this list
    • Learn more