Given the equation Square root of 2x plus 1 = 3, solve for x and identify if it is an extraneous solution. ^ I really don't understand this topic, whatsoever. Could someone help?

My account
Edit my Profile
Private messages
My favorites

Ask a Question
Questions
Unanswered
Tags
Categories
Ask a Question

asked Apr 28, 2017 154k views

0 votes

Given the equation Square root of 2x plus 1 = 3, solve for x and identify if it is an extraneous solution.

^ I really don't understand this topic, whatsoever. Could someone help?

Mathematics
high-school

Brampage asked

by Brampage

8.5k points

0 Comments

Please log in or register to add a comment.

Please log in or register to answer this question.

1 Answer

3 votes

The answer is 4.

Square root of 2x plus 1 = 3:

√(2x+1) =3

Square both sides:

$( √(2x+1) )^(2) =3^(2) \\ \\ 2x+1=9 \\ 2x = 9 - 1 \\ 2x =8 \\ x = 8:2 \\ x =4$

Matan Sanbira answered May 4, 2017

by Matan Sanbira

7.2k points

0 Comments

Please log in or register to add a comment.

Ask a Question

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

8.1m questions

10.8m answers

0 Comments

Please log in or register to add a comment.

Please log in or register to answer this question.

1 Answer

0 Comments

Please log in or register to add a comment.

Other Questions