Question ... help (1 Viewer)

[++jan_H++]

i know that is a easy Q .....

but i still can;t do it ..... whatever how many time i did .... still could;t get the answer .........

solve Z^4-2Z^2+4=0....thx

 

[.ben]

let u=z²

then use quadratic forumala

 

[Riviet]

Yep, that's what I would do, you should get z=+sqrt(1+isqrt3)

 

[++jan_H++]

get it now.... thx guy ...