A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 one year ago
I have my answer, just want to know if the discriminant is right..
y=x^25x8
y=x
2 real solutions and a discriminant of 68.
anonymous
 one year ago
I have my answer, just want to know if the discriminant is right.. y=x^25x8 y=x 2 real solutions and a discriminant of 68.

This Question is Closed

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Would the discriminant be 68 or 17?

Hero
 one year ago
Best ResponseYou've already chosen the best response.0Would you mind showing your work ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yeah one second. I used the quadratic formula b+sqrt b^2  4ac/2a

Hero
 one year ago
Best ResponseYou've already chosen the best response.0Do you know what kind of problem this is you're working on?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yes. I just want to know if my answer is correct

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0It says "use the discriminant to find the number of solutions for each system."

freckles
 one year ago
Best ResponseYou've already chosen the best response.1\[\text{ the disciminant of } y=ax^2+bx+c \text{ is } b^24ac\]

freckles
 one year ago
Best ResponseYou've already chosen the best response.1then how did you get two solutions?

freckles
 one year ago
Best ResponseYou've already chosen the best response.1discriminant will only be one number

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Because the answer it gives me is 6+sqrt68/2 so I was wondering if the discriminant would be 68 or 17 once you simplify it.

freckles
 one year ago
Best ResponseYou've already chosen the best response.1so you didn't use the formula I wrote...

freckles
 one year ago
Best ResponseYou've already chosen the best response.1b^24ac is going to give you the discriminant

freckles
 one year ago
Best ResponseYou've already chosen the best response.1then how did you get + or  for the discriminant ?

freckles
 one year ago
Best ResponseYou've already chosen the best response.1D=b^24ac and you have a=1 b=5 c=8 just plug in D=(5)^24(1)(8) this shouldn't give you 68

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yes it should. You set the two equations equal to each other and get x^26x8=0

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Yes, but there is also the y=x

freckles
 one year ago
Best ResponseYou've already chosen the best response.1because I thought the question was find the discriminant of y=x^25x8? Is that not the question?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So once you put them equal to each other

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Read the entire thing. It is a system. You know with the little {

freckles
 one year ago
Best ResponseYou've already chosen the best response.1Oh I think you are trying to see how many solutions to the system there are I didn't understand the question because the question wasn't actually given in the title

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I just wanted to know if the 68 would give me 2 real solutions

freckles
 one year ago
Best ResponseYou've already chosen the best response.1Yes replace y with x in the first equation \[x=x^25x8 \\ 0=x^26x8 \\ a=1\\ b=6 \\ c=8 \\ D=b^24ac=(6)^24(1)(8)=36+32=68>0\] yes 68>0 so that means you have two solutions

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Is what I was saying all along, but... :/

freckles
 one year ago
Best ResponseYou've already chosen the best response.1It might be good to post the full question in the title next time. It would be very helpful.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Alright, alright.. Thank you nontheless

freckles
 one year ago
Best ResponseYou've already chosen the best response.1Like determine the number of solutions to the system :p
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.