+0  
 
+3
63
1
avatar+702 

http://prntscr.com/kz1t3k

 

http://prntscr.com/kz1tcg

 

thank you really 

critical  Sep 26, 2018
 #1
avatar+92505 
+2

Answered the first one in your other post

 

 

x^4 + 3x^2 - 4     factors as

 

(x^2 + 4) ( x^2 - 1)  =

 

(x + 2 i) ( x - 2 i )  (x + 1) ( x - 1)

 

 

cool cool cool

CPhill  Sep 26, 2018

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