0.6 Complex Numbers Flashcards by Alex Hargen

Q

complex number

A

written as a + bi

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Q

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

A

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

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Q

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

A

= (a – c) + (b –d)i.

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Q

Multiply
(a + bi) (c + i)

A

FOIL Method
ac + ia +cbi +bi^2

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Q

Complex conjugate

A

z = a + bi

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Q

multiplicative identity

A

1 = 1 + 0i.

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Q

Multiplicative inverse

A

z = a + bi

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Q

Dividing complex numbers

A

(1) multiply by opposite of the denominator

(2) solve

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