Vince D.

asked • 09/02/15

How do I find the answer to vx+2=x-4

I know the answer is 7, but I can't count on trial and error, or luck , to help me on a test! What's the best method to finding the answer, especially since I need to show my work?

2 Answers By Expert Tutors

By:

Mark M. answered • 09/02/15

Tutor
5.0 (243)

Mathematics Teacher - NCLB Highly Qualified

Imtiazur S.

tutor
2 is an extraneous solution and the only valid solution is 7
Report

09/03/15

Mark M.

As I commented, that may depend on one's interpretation of √x.
Report

09/03/15

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.