What is the product of the complex numbers (1 + i) and (1 - i)?

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Question: What is the product of the complex numbers (1 + i) and (1 - i)?

Options:

Correct Answer: 2

Solution:

(1 + i)(1 - i) = 1^2 - i^2 = 1 - (-1) = 2.

What is the product of the complex numbers (1 + i) and (1 - i)?

What is the product of the complex numbers (1 + i) and (1 - i)?

Step 1: Identify the complex numbers. We have (1 + i) and (1 - i).
Step 2: Use the formula for multiplying two binomials: (a + b)(c + d) = ac + ad + bc + bd.
Step 3: In our case, a = 1, b = i, c = 1, and d = -i.
Step 4: Multiply the first terms: 1 * 1 = 1.
Step 5: Multiply the outer terms: 1 * -i = -i.
Step 6: Multiply the inner terms: i * 1 = i.
Step 7: Multiply the last terms: i * -i = -i^2. Since i^2 = -1, this becomes -(-1) = 1.
Step 8: Now combine all the results: 1 - i + i + 1.
Step 9: The -i and +i cancel each other out, leaving us with 1 + 1 = 2.
Step 10: Therefore, the product of (1 + i) and (1 - i) is 2.

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