Multiply $( 2 + 8 i )$ by its complex conjugate and simplify.
A)68
B) $- 60$
C) $10 + 8 i$
D) $68 + 32 i$
E)10

Name: Multiply $( 2 + 8 i )$ by its complex conjugate and simplify. A)68 B) $- 60$ C) $10 + 8 i$ D) $68 + 32 i$ E)10
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Question

Quizplus · Accepted Answer

The complex conjugate of $2 + 8i$ is $2 - 8i$. Multiplying these together: $(2 + 8i)(2 - 8i) = 4 - 64i^2$. Since $i^2 = -1$, this simplifies to $4 + 64 = 68$.

Multiply (2+8i)( 2 + 8 i )(2+8i) By Its Complex Conjugate and Simplify

Multiply $( 2 + 8 i )$ By Its Complex Conjugate and Simplify