Complex Numbers Vocabulary & Properties Worksheet Page 2
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1
2Examples
To add or subtract, combine like terms.
i
i
i) (3 + 5
) + (2 - 4
)
)
19
19
)
-9
81
e
f
−
−
=
−
=
i
i
j) (4 - 6
) - (3 - 7
)
40
160
−
−
g
)
h
)
=
10
10
−
i
i
i
k) (9+
) – (3 + 2
) + (-5 – 3
)
For binomials, use the distributive property or
2
FOIL. (Don’t forget to substitute ___for
i
.
)
l
) 3i (-2i)
m
) 5 (6 4 )
i
i
+
2
n
) (7- -16)(2
9)
o
) ( 4 2 )
i
+ −
− −
Summary
Complex numbers standard form: a+b
i
To add or subtract, combine like terms.
Simplify before multiplying.
2
Always substitute -1 for
i
.
Never leave an imaginary unit in the
denominator.
2
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