Question Detail

MTH 101 MTH 101 Past Questions Objective Question

Question

Given that z₁ = 2 - 2i and z₂ = 1 + i, find z₁/z₂

Options
A 2 - 4i
B 2 + 4i
C 0 - 2i
Correct Answer
D 3 - 3i
Correct Answer

Option C is the correct answer.

Detailed Explanation

z₁/z₂ = (2 - 2i)/(1 + i). Multiply numerator and denominator by the conjugate (1 - i): (2 - 2i)(1 - i)/((1 + i)(1 - i)) = (2 - 2i - 2i + 2i²)/(1 - i²) = (2 - 4i - 2)/(1 + 1) = (-4i)/2 = -2i.

Hint

Multiply numerator and denominator by the conjugate of the denominator.

Question Info