Question

Which complex number has an absolute value of 5?
–3 + 4i
2 + 3i
7 – 2i
9 + 4

Answer 1

Explanation:

-3 + 4i

value = square( (-3)^2 + (4i)^2 ) = sqr(9 + 16) = sqr(25) = 5

The absolute value is like the Pythagoras theorem