Looking for something else?

Not the answer you are looking for? Search for more explanations.

## More answers

Looking for something else?

Not the answer you are looking for? Search for more explanations.

- ganeshie8

i am getting two solutions for this problem. but only one is satisfying the equation. could someone pls explain whats going on...
http://assets.openstudy.com/updates/attachments/50064e0ae4b0624180677e0a-emily9102-1342590484915-mathproblem5.jpg

Get our expert's

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this

and **thousands** of other questions.

Get your **free** account and access **expert** answers to this and **thousands** of other questions

- ganeshie8

- katieb

See more answers at brainly.com

Get this expert

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this

and **thousands** of other questions

- anonymous

square it and try?

- ganeshie8

|dw:1342591850277:dw|

- ganeshie8

x =1 is not satisfying the equation :( not sure why

Looking for something else?

Not the answer you are looking for? Search for more explanations.

- ganeshie8

hmm

- anonymous

man u have squared it so ofcourse one will not match?

- anonymous

when you square something, you will always get two solutions, and not all of them will be right. substitute the answers back into the original equation to check. in this case, 1 is not the solution as -1 is not equal to 1

- ganeshie8

im li'l lost.... could u elaborate pls.. ?

- ganeshie8

i see we are squaring... and losing sign sensitivity is it

- anonymous

u must consider restrictions in every step
note that when u have \( x-3=2 \sqrt{x} \) then \( x-3 \ge0 \)

- ganeshie8

ah that makes sense. thanks mukushla straight to the point. :)

- anonymous

welcome my friend

- anonymous

I suppose this also applies to irrational equations like this?
\[\sqrt{x-1}+\sqrt{x+4}=\sqrt{3x+10}\]
I got \(x = 5\) and \(x = \frac{-13}{3} \)
\(x = \frac{-13}{3} \) is rejected in this case as well because after substituting into the equation, it became undefined.

- ganeshie8

yeah now i understand thanks higgs :D
here, from the first equation itself, we can apply the restriction x >=1. and hence rejected solutions < 1

- anonymous

The sollutions we get after solving , and which does not satisfy the origanal question are called extraneous sollutions. There occurred as we have squared , so there is a chance of getting a extraneous sollution.

Looking for something else?

Not the answer you are looking for? Search for more explanations.