Posted by sarah on .
Evaluate x^2  3x + 6 for x=3+i
(3+i)^2  3(3+i)+6
3+2i93i+6
I got 0  1i
is this correct or do i use 0

math 
Reiny,
from
(3+i)^2  3(3+i)+6
= 9 + 6i + i^2  9  3i + 6
= 3i + 5, remember i^2 = 1