0.6 Complex Numbers

Question 1

complex number

Answer 1

written as a + bi

Question 2

Add
(a + bi) + (c + di)

Answer 2

(a + c) + (b + d)i

Question 3

Subtract
(a + bi) - (c + di)

Answer 3

= (a – c) + (b –d)i.

Question 4

Multiply
(a + bi) (c + i)

Answer 4

FOIL Method
ac + ia +cbi +bi^2

Question 5

Complex conjugate

Answer 5

z = a + bi

Question 6

multiplicative identity

Answer 6

1 = 1 + 0i.

Question 7

Multiplicative inverse

Answer 7

z = a + bi

Question 8

Dividing complex numbers

Answer 8

(1) multiply by opposite of the denominator

(2) solve