Like what you saw?
Create FREE Account and:
 Watch all FREE content in 21 subjects(388 videos for 23 hours)
 FREE advice on how to get better grades at school from an expert
 Attend and watch FREE live webinar on useful topics
Completing the Square  Problem 6
Alissa Fong
Alissa Fong
MA, Stanford University
Teaching in the San Francisco Bay Area
Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts
The first step in completing the square is making sure the leading coefficient, "a", is one. After that, you take half of the "b" term, square it, and add that result to both sides of the equation. You need to add it to both sides to ensure that the equation remains balanced (that is, you can't add something to one side, but not the other.) In this case, since "b" is odd, when you go to take half of "b," you'll be working with a fraction. To square it, square both the top and bottom values. From there, factor your square trinomial. Now you are done completing the square, but usually the instructions ask you to continue to solve: square root both sides using + and , and then solve for x.
Transcript Coming Soon!
Please enter your name.
Are you sure you want to delete this comment?
Alissa Fong
M.A. in Secondary Mathematics, Stanford University
B.S., Stanford University
Alissa has a quirky sense of humor and a relatable personality that make it easy for students to pay attention and understand the material. She has all the math tips and tricks students are looking for.
Your tutorials are good and you have a personality as well. I hope you have more advanced college level stuff, because I like the way you teach.”
Thanks alot for such great lectures... I never found learning this easier ever before... keep up the great work.... :)”
You seem so kind, it's awesome. Easier to learn from people who seem to be rooting for ya!' thanks”
Concept (1)
Sample Problems (8)
Need help with a problem?
Watch expert teachers solve similar problems.

Completing the Square
Problem 1 9,472 viewsSolve:
3p² − 12p − 15 = 0 
Completing the Square
Problem 2 6,924 viewsSolve x² − 10x − 40 = 0 by completing the square. Round your answer to the nearest hundredth.

Completing the Square
Problem 3 6,053 viewsSolve 4x² − 4x + 9 = 0 by completing the square.

Completing the Square
Problem 4 4,890 viewsMake x² + 8x + ___ a perfect square trinomial.

Completing the Square
Problem 5 671 views 
Completing the Square
Problem 6 597 views 
Completing the Square
Problem 7 552 views 
Completing the Square
Problem 8 654 views
Comments (0)
Please Sign in or Sign up to add your comment.
·
Delete