Please help me solve this inequality

I saw this inequality problem at a web site

2x2<32

x2<16

but answer shows x<4

but why not x<-4

here's the link check it out

http://math.tutorvista.com/algebra/solving-inequalities.html

Liked this question? Tell your friends about it

Answers

The answer to x^2 < 16 cannot be x < -4 because for example x = -5 gives x^2 = 25.  The solution x < 4 is OK for positive x, but x = -5 would still be a problem.  The correct answer is |x| < 4, or -4 < x < 4.

Related Questions

Other people asked questions on similar topics, check out the answers they received:

Asked: Science

What are the various forms of evidence for evolution?

Asked: What will be the development trend of mining ...

Withthe rapid development of science and technology, we have entered the digital information age.This is known to all that informatization has four characteristics , namely intelligent , electronic ...

Asked: Meaning of words in science

What do the words actually "tell" us? Is science possible without definitions? http://www.surveymonkey.com/s/FR7TQQ7 Thank you in advance for helping me out with this :)

More Questions

Need help with my password

Hi Thurman, For assistance, please refer to the help article below: Password help for AOL and AIM

Need login help on cradduckcrick@aol.com account

Hi Carmen: So I can better assist you, could you tell me if you're using the AOL Desktop software or AOL Webmail? If you're using the AOL Desktop software, please let me know what version you are using. Also, do you get an error message? If you get an error message, could you tell me what it ...

Research Paper Help Online

I am the one who often seek for the help in the online for the research paper and i tried so many online site for my research paper as well but i never get the best result as i want but when i tried with the powered essay. I just can't explain they are so good with their writing skills. Check this ...

My account is blocked nothing in or out. Have already changed passwords

Hi Andrew, So I can better assist you, could you tell me if you're using the AOL Desktop software or AOL Webmail? If you're using the AOL Desktop software, please let me know what version you are using. Are you able to sign into your AOL account? Can you see your emails? Are you able to receive ...