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Question #df1ef

1 Answer

Nov 23, 2016

#P(1-3i)=-13-6i#

Explanation:

#P(x)=x^2-5#

#P(1-3i)=(1-3i)^2-5#
#=(1-3sqrt(-1))(1-3sqrt(-1))-5#
#=1-3sqrt(-1)-3sqrt(-1)+9(-1)-5#
#=1-6i-14#
#=-13-6i#

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