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x+4)^2 > 4 what is the value of x 07 Jul 2009, 17:04
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(x+4)^2 > 4

what is the value of x?



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Hi there,
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x+4)^2 > 4 what is the value of x 07 Jul 2009, 19:15
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for (x+4)^2 to be >4, (x+4) must either be < -2 or > 2

when x+4 < -2 ; x < -6
when x+4 > 2 ; x > -2
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x+4)^2 > 4 what is the value of x 08 Jul 2009, 21:26
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[m]x^2[/m]
As per instructions given to write the formula in a more readable format I tried the following.

Step 1 - I wrote X^2.
Step 2 - I highlighted X^2 and then clicked m given on top. This made it appear as [m]x^2[/m].
Step 3 - I submitted the post.

Result -
As you can see that it did not showed it as a mathematical symbol. Can someone help please. My explanation could have been much simpler had I been able to display the mathematical formula.

Mods please help me and le me know what I missed.
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x+4)^2 > 4 what is the value of x 08 Jul 2009, 21:48
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(x+4)^2 > 4

Make it a equality first.
(x+4)^2 = 4
Solve it we get
(X+2)(X+6) = 0
This means
X = -2 or X = -6.
Now this -2 and -6 are our check points. what we have done is that we have broken the number line into 3 intervals.
(-infiniy,-6) (-6,-2) and (-2,+infinity). we just need to check that within which interval this expression is positive (why positive ? because the initia inequality asked us to find > 4. Had the initial inequaiy asked us to find <4 then we would have find out within which of these 3 interval we have a -ve value).
Now make a grid as follows or use the check point method. I do not recommend check point method so lets go with the grid.

refer my attachment as I do not know how to put a picture here.
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Inequality.doc [27.5 KiB]
Downloaded 131 times

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nookway
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x+4)^2 > 4 what is the value of x 08 Jul 2009, 22:17
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mdfrahim
\(x^2\)
As per instructions given to write the formula in a more readable format I tried the following.

Step 1 - I wrote X^2.
Step 2 - I highlighted X^2 and then clicked m given on top. This made it appear as \(x^2\).
Step 3 - I submitted the post.

Result -
As you can see that it did not showed it as a mathematical symbol. Can someone help please. My explanation could have been much simpler had I been able to display the mathematical formula.

Mods please help me and le me know what I missed.
Show more

I noticed that you had 'Disable BBCode' checked. Uncheck it and it should work.
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mdfrahim
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x+4)^2 > 4 what is the value of x 08 Jul 2009, 23:36
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Can you please tell me how to do this ? I have no idea what a BBCode is !!!!
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nookway
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x+4)^2 > 4 what is the value of x 09 Jul 2009, 00:48
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mdfrahim
Can you please tell me how to do this ? I have no idea what a BBCode is !!!!
Show more

I have attached a screenshot and if you look under options you will see that you have that flag checked.



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Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
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