4
QuizMultiple Choice

Operations with Complex Numbers — Quiz

Question 4 • Advanced Algebra: Concepts and Connections

Which equation illustrates the identity property of multiplication?

Answer
A
open paren A plus b i close paren times c is equal to open paren A c plus b c i close paren
B
open paren A plus b i close paren times 1 is equal to open paren A plus b i close paren
C
open paren A plus b i close paren times open paren c plus d i close paren is equal to open paren c plus d i close paren times open paren A plus b i close paren
D
open paren A plus b i close paren times 0 is equal to 0

Explanation

The identity property of multiplication says that multiplying any number by 1 leaves it unchanged. Choice A shows this: (a + bi) × 1 = a + bi. Multiplying by 0, as in choice B, gives zero instead.

AI-written and checked against the verified answer.

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