Hi,(adsbygoogle = window.adsbygoogle || []).push({});

I'm studying my algebra and I was trying this exercise:

Solve

z³+iz²-7z-iz-6-6i=0

I found the 2 real solutions (3 and -2) but i can't seem to find the complex one.

I tried this:

(z²-z)(i)=6(i) ==> z= -2 and 3

z³-7z=6==> z= -1, -2 and 3

I found that the complex solution is -1-i but i have no idea how to find it.

(Im from Belgium, it's difficult to type maths in another language so sorry for mistakes)

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# Complex solution of a cubic function.

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