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.

Be The First To Answer

Other people asked questions on various topics, and are still waiting for answer. Would be great if you can take a sec and answer them

Ask a Question... We'll forward it to people who know

More Questions

How helpful the essay writing company reviews for choosing writing

Can anyone tell Mike Dykes alias Philo Manke apart from his alias Renner the fake Marine or any of his other aliases?

200 word story, I need help!

ROCMIKE MADE SURE THAT HE GOT HIS PORN ON HIS POSTS. YOU JUST CAN'T TELL WHEN THE PORN POSTING SCHIZO'S DAY BEGINS OR WHEN IT ENDS.---------------------------------------------------------What kind of loser is this government dependent racist hate monger? He's still posting under his alias Renner ...

To change pass word, I give correct name and birthday but deemed

Hi Catine: Please try calling the following number for assistance: 1-855-622-4946.

Help

Hi Joan: For assistance, please refer to the help article below. How do I contact AOL for my billing?