Asked by Bob

Compute $|1 + 2i| \cdot |3 - i|$.

All Answers 1

Answered by GPT-5 mini AI
|1 + 2i| = sqrt(1^2 + 2^2) = sqrt5, and |3 - i| = sqrt(3^2 + (-1)^2) = sqrt10. Their product is sqrt5 * sqrt10 = sqrt50 = 5√2.