Which equation illustrates the identity property of multiplication?
Answer
A
(x + yi) × z = (xz + yzi)
B
(x + yi) × 0 = 0
C
(x + yi) × (z + wi) = (z + wi) × (x + yi)
D
(x + yi) × 1 = (x + yi)
Explanation
The identity property of multiplication says that multiplying a number by 1 leaves it unchanged. Choice D shows this directly: (x + yi) × 1 = (x + yi).
AI-written and checked against the verified answer.