Question 407995
Evaluate x^2-3x+4 evaluated for x=1+i
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Sub 1+i for x
x^2-3x+4 
= (1+i)^2 - 3(1+i) + 4
= 1 + 2i -1 - 3 - 3i + 4
= -i + 1
= 1 + i