What is (1 + i) squared?
A1 + 2i
B2
C2i
D0
Answer & Solution
Correct answer: C. 2i
(1 + i)^2 = 1 + 2i + i^2 = 1 + 2i - 1 = 2i.
Related questions
The argument of z is measured anticlockwise from which axis?How many distinct fifth roots does the number 1 have in the complex numbers?What is the multiplicative inverse of the imaginary unit i?A real-coefficient polynomial has 2 + 3i as a root. Which must also be a root?What are the roots of x^2 - 2x + 5 = 0?Which of these is a square root of -16 in the complex numbers?Evaluate (1 + i) raised to the fourth power.Find the modulus of (1 + i) raised to the eighth power.