A community for students.
Here's the question you clicked on:
 0 viewing
justinee
 2 years ago
Can someone check this for me? (completing the square)
justinee
 2 years ago
Can someone check this for me? (completing the square)

This Question is Closed

justinee
 2 years ago
Best ResponseYou've already chosen the best response.0then i rewrote that into: y = 2(x^2  20x ____) 48 20/2 = 10 then square it and I got 100 y = 2(x^2  20x +100) 48

justinee
 2 years ago
Best ResponseYou've already chosen the best response.0then I added 100 to both sides and I got: y + 100= 2(x  10)^2 48 100 100  y = 2(x  10)^2  148

halorazer
 2 years ago
Best ResponseYou've already chosen the best response.0You subtracted 100 though ^

Decart
 2 years ago
Best ResponseYou've already chosen the best response.1you add 48 to the other side and then also the 100 and the quadratic = 148

Decart
 2 years ago
Best ResponseYou've already chosen the best response.1then you can factor the left side

justinee
 2 years ago
Best ResponseYou've already chosen the best response.0can you show me that in steps? like from the beginning

Decart
 2 years ago
Best ResponseYou've already chosen the best response.1you did it rite just set the equation = 0 then subtract 49 from both sides so 2x^220x=48

Decart
 2 years ago
Best ResponseYou've already chosen the best response.1then complete the square and add the 100 to both sides

justinee
 2 years ago
Best ResponseYou've already chosen the best response.0so it'd be 0 = 2(x^2  20x + 100) 48 ?

justinee
 2 years ago
Best ResponseYou've already chosen the best response.0why do I need to factor that

justinee
 2 years ago
Best ResponseYou've already chosen the best response.0Ok I got it thanks! and one more question

justinee
 2 years ago
Best ResponseYou've already chosen the best response.0How would I solve: x^2  38x + c also by completing the square

Decart
 2 years ago
Best ResponseYou've already chosen the best response.1c is a constant most likely just move it to the other side and complete the square

justinee
 2 years ago
Best ResponseYou've already chosen the best response.0what is that going to give me?

justinee
 2 years ago
Best ResponseYou've already chosen the best response.0and what would be the next step

justinee
 2 years ago
Best ResponseYou've already chosen the best response.00 = (x2  38x ___) +c ?

Decart
 2 years ago
Best ResponseYou've already chosen the best response.1square the 38 and do the same to both sides

Decart
 2 years ago
Best ResponseYou've already chosen the best response.1so that is on both sides

justinee
 2 years ago
Best ResponseYou've already chosen the best response.0okay so far i have: (x^2  38x + 361) = 361 c

Decart
 2 years ago
Best ResponseYou've already chosen the best response.1right now you should be able to factor the quadratic which is the point of completing the square

justinee
 2 years ago
Best ResponseYou've already chosen the best response.0so like: ____ x___ = 361 ____+___= 38

Decart
 2 years ago
Best ResponseYou've already chosen the best response.1right it will be the same number it is squared

Decart
 2 years ago
Best ResponseYou've already chosen the best response.1and the first equation was x^210+25=49

Decart
 2 years ago
Best ResponseYou've already chosen the best response.1with the second you can't do anything it is most likely to show how you did the work

justinee
 2 years ago
Best ResponseYou've already chosen the best response.0how would i write tht in intercept form

justinee
 2 years ago
Best ResponseYou've already chosen the best response.0no I also have to rewrite tht in intercept

Decart
 2 years ago
Best ResponseYou've already chosen the best response.1the x intercept is +or(7/5,0)
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.