Perform the operation and write the result in standard form. $( 10 - 9 i ) ^ { 2 }$
A) $19 - 180 i$
B) $- 19 - 180 i$
C) $19 + 180 i$
D) $21 - 180 i$
E) $- 19 + 180 i$

Name: Perform the operation and write the result in standard form. $( 10 - 9 i ) ^ { 2 }$ A) $19 - 180 i$ B) $- 19 - 180 i$ C) $19 + 180 i$ D) $21 - 180 i$ E) $- 19 + 180 i$
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Question

Quizplus · Accepted Answer

Expanding $(10 - 9i)^2$ gives $10^2 - 2 \cdot 10 \cdot 9i + (9i)^2 = 100 - 180i - 81 = 19 - 180i$.

Perform the Operation and Write the Result in Standard Form (10−9i)2( 10 - 9 i ) ^ { 2 }(10−9i)2

Perform the Operation and Write the Result in Standard Form $( 10 - 9 i ) ^ { 2 }$