Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
Solve the equation. Identify any extraneous solutions.
 9 months ago
 9 months ago
Solve the equation. Identify any extraneous solutions.
 9 months ago
 9 months ago

This Question is Closed

ExplainItLikeImFiveBest ResponseYou've already chosen the best response.0
A. 6 is a solution to the original equation. The value –5 is an extraneous solution. B. 6 and 5 are both extraneous solutions. C. 5 is a solution to the original equation. The value –6 is an extraneous solution. D. 6 and –5 are solutions.
 9 months ago

dan815Best ResponseYou've already chosen the best response.0
do u know the meaning of extraneous
 9 months ago

ExplainItLikeImFiveBest ResponseYou've already chosen the best response.0
That it's unrelated, I think.
 9 months ago

cwrw238Best ResponseYou've already chosen the best response.1
square both sides x^2 = x+ 30 x^2 x  30 = 0 can u solve this?
 9 months ago

cwrw238Best ResponseYou've already chosen the best response.1
extraneous means that although the working out gives it as a solution , it is not possible as a root
 9 months ago

cwrw238Best ResponseYou've already chosen the best response.1
not quite (x  6)(x + 5) = 0 giving x = 6 , 5
 9 months ago

ExplainItLikeImFiveBest ResponseYou've already chosen the best response.0
So what do I do with that?
 9 months ago

cwrw238Best ResponseYou've already chosen the best response.1
well see if these roots are possible by substituting each into the original equation
 9 months ago

cwrw238Best ResponseYou've already chosen the best response.1
eg x = 6 6 = sqrt(6 + 30) 6 = 6  so that is a genuine root
 9 months ago

ExplainItLikeImFiveBest ResponseYou've already chosen the best response.0
So I can eliminate B and C
 9 months ago

ExplainItLikeImFiveBest ResponseYou've already chosen the best response.0
I dont think so.
 9 months ago

cwrw238Best ResponseYou've already chosen the best response.1
try plugging in 5 for x in the original equation
 9 months ago

cwrw238Best ResponseYou've already chosen the best response.1
 5 = sqrt (5 + 30) does that work out?
 9 months ago

cwrw238Best ResponseYou've already chosen the best response.1
what are the square roots of 25?
 9 months ago

ExplainItLikeImFiveBest ResponseYou've already chosen the best response.0
So they're both genuine making them both solutions.
 9 months ago

ExplainItLikeImFiveBest ResponseYou've already chosen the best response.0
I do believe I'd pick D
 9 months ago

ExplainItLikeImFiveBest ResponseYou've already chosen the best response.0
Thank you very much.
 9 months ago

cwrw238Best ResponseYou've already chosen the best response.1
please explain why thats wrong
 7 months ago

LaaislimaBest ResponseYou've already chosen the best response.0
ask the teacher, I answered D and I got it wrong.
 7 months ago

dan815Best ResponseYou've already chosen the best response.0
oh sorry this is your question dw:1377219778699:dw
 7 months ago

dan815Best ResponseYou've already chosen the best response.0
your answers are 6 and 5!
 7 months ago

LaaislimaBest ResponseYou've already chosen the best response.0
The right answer should be 6 is a solution to the original equation. The value –5 is an extraneous solution.
 7 months ago
See more questions >>>
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.