+0  
 
+5
163
6
avatar+5102 

Simplify. Identify any x values for which the expression is undefined.

 

-x2+16
---------
-x2-9x-20

 

Please hurry! This is urgent!

rarinstraw1195  Mar 14, 2017

Best Answer 

 #6
avatar+5102 
+10

Thanks for the tip!

rarinstraw1195  Mar 14, 2017
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6+0 Answers

 #1
avatar+89777 
0

Why is it urgent?  Are you doing a test?

Melody  Mar 14, 2017
 #2
avatar+5102 
0

I'm really cutting a few deadlines close, and it is due to... PROCRASTINATION. the wonderful thing that makes a person do both 30 minutes of work in 8 hours and 8 hours of work in 30 minutes. 

rarinstraw1195  Mar 14, 2017
 #4
avatar+89777 
0

Yes I can totally relate to that. :(

Melody  Mar 14, 2017
 #3
avatar+75332 
+5

This will be undefined when

 

-x^2 -9x - 20  = 0      multiply through by -1

 

x^2 + 9x + 20  = 0     factor

 

(x + 4) ( x + 5)  = 0

 

Setting both factors to 0  and solving for x we have that the function will be undefined

whenever x = - 4  or x = - 5

 

 

cool cool cool

CPhill  Mar 14, 2017
 #5
avatar+1477 
+10

Here's a tip for these types of problems that may prevail later on. Set the denominator eual to zero and try to factor the denominator.

HighSchoolCalculus  Mar 14, 2017
 #6
avatar+5102 
+10
Best Answer

Thanks for the tip!

rarinstraw1195  Mar 14, 2017

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