Question Detail
Question
Given that z₁ = 1 - 7i and z₂ = -2 + 5i. Find the magnitude of z₁ - z₂.
Correct Answer
Option D is the correct answer.
Detailed Explanation
z₁ - z₂ = (1 - 7i) - (-2 + 5i) = 1 - 7i + 2 - 5i = 3 - 12i. |z₁ - z₂| = √(3² + (-12)²) = √(9 + 144) = √153.
Hint
Subtract the complex numbers, then find the modulus.