Imaginary numbers: To answer an imaginary numbers question like this, you have to know how to
use your i’s. When you’re adding or subtracting, i’s act a lot like variables:
But when you’re multiplying, or raising to a power, don’t forget to take that extra step of changing i^2
to –1:
COMPLEX NUMBERS
A number in the form a + bi, where a and b are real numbers, is called a complex number.Notice that when you raise i to successive powers, a pattern develops: