+0  
 
0
555
1
avatar

thank you

 Oct 3, 2018
 #1
avatar+130516 
+1

x^2 + 20  =

 

(x + i√20 ) (x - i√20)  =

 

(x + 2i√5 ) ( x - 2i√5 )

 

 

 

cool cool cool

 Oct 3, 2018

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