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# Operations on Complex Numbers - Practice #2 (Grades 11-12)

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## Operations on Complex Numbers - Practice #2

1.
Add. $(5-2i) + 3i$
1. $11$
2. $6 + 15i$
3. $5 + i$
4. $5 - 5i$
2.
Subtract. $(-3 + 2i) - (-4 - 8i)$
1. $-7 - 6i$
2. $1 + 10i$
3. $1 - 6i$
4. $7+ 10i$
3.
Perform the operation for the complex number radical expression $sqrt(-64)+sqrt(-36)$.
1. $-14i$
2. $14i$
3. $14$
4. $-14$
4.
Evaluate. $i^29 + 1/i^29$
1. 0
2. 1
3. -1
4. 2
5.
Find the product. $5i(-i)$
1. $-5$
2. $5$
3. $-5i$
4. $5i$
5. $1$
6.
Multiply and simplify the complex numbers in the following expression. $(-3+2i)(-6-8i)$
1. $-34-12i$
2. $34+12i$
3. $34-12i$
4. $-34+12i$
7.
Expand and simplify. $(5-10i)(5+10i)$
1. $-125$
2. $25 - 100i$
3. $150i$
4. $125$
8.
Find the quotient. $6/(-4i)$
1. $-3i$
2. $3i$
3. $(-2i)/3$
4. $(2i)/3$
5. $(3i)/2$
6. $(-3i)/2$
9.
Divide and simplify the following complex number expression. $(4-9i)/(-6i)$
1. $-3/2+2/3i$
2. $3/2+2/3i$
3. $-3/2-2/3i$
4. $3/3-2/3i$
10.
Simplify. $(2-i)/(-3+6i)$
1. $-4/9-1/3i$
2. $-4/15-1/3i$
3. $-4/15-1/5i$
4. $-1/5i$
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