## Algebra 2 Tutorial

*Multiplying Complex Numbers*

#### Intro

We wish to multiply two complex numbers, say (a+bi)(c+di)

We will use the FOIL method: First Outer Inner Last.

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PLOT

(PL)(OT)

(PO) + (PT) + (L0) + (LT)

F…………O…………I…………L

*your plot has been foiled*

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#### Sample Problem

Let’s say we want to multiply

(3+4i) by (-2+6i)

#### Solution

xxxx …..using foil

……..(x) is negative because

……………………………………………i squared is negative 1

so

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I have extensive teaching experience over 40 years: Physics lecturer at LSU Physics teaching assistant at LSU Tutored athletes at UCONN Mentored engineers and technicians at TI, Atmel and IMFT Private tutoring at Cheyenne Mountain High School I have a masters degree i... |

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