Home › CBSE Class 11 (Commerce) › Mathematics › Complex Numbers and Quadratic Equations › Find (1 + i)(1 - i).
Find (1 + i)(1 - i).
A0
B2i
C2
D1
Answer & Solution
Correct answer: C. 2
(1 + i)(1 - i) = 1 - i^2 = 1 + 1 = 2.
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