Question
Fri April 06, 2012 By: Priyank Mahajan
 

Find the value of x3 + 7x2 -x +16 when x=1 + 2i(iota)

Expert Reply
Sun April 08, 2012
In the given equation, put 1 + 2i in place of x.
You will get
(1+2i)3 + 7(1+2i)2 - (1 +2i) + 16
Simplify this to get,
1 - 8i + 6i - 12 - 2i + 28i - 1 - 2i + 16 = -17 + 24 i
 
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