13
QuizMultiple Choice
Powers and Roots of Complex Numbers — Unit test
Question 13 of 25 • Precalculus
When asked to find the distance between the complex points 3 + 8i and 7 + 6i, Zach showed the work below. He asked his friend Zöe to find his mistake, and she correctly told him that he should have
Answer
A
subtracted the real and imaginary portions of the point in the same order.B
left the i out of the computations when finding distance in the complex plane.C
remembered that –4 squared should be –16, not 16.D
simplified to , not to .