A community for students.
Here's the question you clicked on:
 0 viewing
help2013
 one year ago
solve inequality
help2013
 one year ago
solve inequality

This Question is Closed

help2013
 one year ago
Best ResponseYou've already chosen the best response.0can u show me how plzzzzz! an dthanks

bii17
 one year ago
Best ResponseYou've already chosen the best response.0\[(x4)^2 = x+8\] \[x^2 8x +16 = x+8\] combine similar terms it will become \[x^2 9x+8 =0\] factor (x+9) (x1) = 0 to check, substitute x=9 or x=1

tkhunny
 one year ago
Best ResponseYou've already chosen the best response.1\(x4 = \sqrt{x+8}\) First, before ANYTHING else, think about the Domain. \(x+8\ge 0\;or\;x \ge 8\) You tell me why? \(x4\ge 0\;or\;x \ge 4\) You tell me why? After that, if we get ANY result for x that is less than 4, we will simply discard it as extraneous. It should not even be considered as a solution. x = 1 is not correct. x = 9 is not correct.

tkhunny
 one year ago
Best ResponseYou've already chosen the best response.1Seriously. Go try them in the original equation. They fail miserably.

help2013
 one year ago
Best ResponseYou've already chosen the best response.0well then is the answer zero

tkhunny
 one year ago
Best ResponseYou've already chosen the best response.1No, x = 0 is also incorrect. The only suspected results are x = 1 and x = 8. (The factoring shown above was incorrect.) x = 1 is immediately discarded as not in the Domain. x = 8 is a solution. x = 9 could not have been a solutions, as 9 < 1. x = 0 could not be a solution, as 0 < 1 If you rule out ALL your suspects, there is NO solution. In this case x = 8 is the winner.

help2013
 one year ago
Best ResponseYou've already chosen the best response.0ohh well thats not one of my answer choices?:/

help2013
 one year ago
Best ResponseYou've already chosen the best response.0opps nv thanks for the help
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.