A community for students.
Here's the question you clicked on:
 0 viewing
123goldie
 4 years ago
How do you complete the square?
123goldie
 4 years ago
How do you complete the square?

This Question is Closed

123goldie
 4 years ago
Best ResponseYou've already chosen the best response.0I mean with like quadratic equations...

Harkirat
 4 years ago
Best ResponseYou've already chosen the best response.0u add square of half the coefficient of x to both sides.....

Harkirat
 4 years ago
Best ResponseYou've already chosen the best response.0if u give a question I can explain..

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.2in algebra we are given an equation; quadratic in nature usually; and in order to "complete the square" we can look to geometry: for instance: x^2 +6x + ??? completes the square set it up like this \begin{array}c &&&6/2\ xs\\ &x^2&x&x&x\\ &x&1&2&3\\ 6/2\ xs&x&4&5&6\\ &x&7&8&9\\ \end{array} it take an additional 9 pieces to "complete" the square

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.2while the geometry is useful to describe what a "complete square" square is; it impractical to use all the time; so we take our lead from it and abstractly construct our square with half of our "x" coefficient; and square it

Diogo
 4 years ago
Best ResponseYou've already chosen the best response.1example: you have x^2 + 10x + C you want to find C. just simply solve this equation: \[10x = 2x*\sqrt{C}\] i mean, you have to match the second term with this expression ( 2x*sqrt(C) )

Diogo
 4 years ago
Best ResponseYou've already chosen the best response.1it will give you C = 25. Thats the number you were looking for ;)

Diogo
 4 years ago
Best ResponseYou've already chosen the best response.1I've found this out by myself when i was in college. It was very useful for my advanced math classes

Diogo
 4 years ago
Best ResponseYou've already chosen the best response.1I've found this out by myself when i was in college. It was very useful for my advanced math classes

Harkirat
 4 years ago
Best ResponseYou've already chosen the best response.025 = 5² which is square of half of the coefficient of x as I said !!!

Diogo
 4 years ago
Best ResponseYou've already chosen the best response.1well.. here is the proof of what you said then. only words doesnt mean anything :p

gandalfwiz
 4 years ago
Best ResponseYou've already chosen the best response.0could I have another example?

gandalfwiz
 4 years ago
Best ResponseYou've already chosen the best response.0Just to get it in my brain :)

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.2abstract: ax^2 +bx +c c = (b/2)^2

Diogo
 4 years ago
Best ResponseYou've already chosen the best response.1x^2 + 4x + C 4x = 2x*sqrt(C) 2 = sqrt(C) C = 4 so: x^2 + 4x + 4 = perfect square

amistre64
 4 years ago
Best ResponseYou've already chosen the best response.2thats if a=1 i believe
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.