+0  
 
+1
69
2
avatar+92 

For what real values of a is the expression \(\frac{a+3}{a^2-4}\) undefined? List your answers in increasing order separated by commas.

 Jul 17, 2020
 #1
avatar+21953 
+1

This expression will be undefined only when the denominator is zero

 

--->     a2 - 4  =  0     --->     (a - 2)(a + 2)  =  0

 

So, the two times that the expression is undefined occurs when  a = 2  or  a = -2.

 Jul 17, 2020
 #2
avatar+92 
0

Thanks!

 

(new question deleted by melody)

Unicornrabbit  Jul 17, 2020
edited by Melody  Jul 17, 2020

46 Online Users

avatar
avatar