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# Complex Conjugates (Grades 11-12)

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## Complex Conjugates

1.
The complex conjugate of $-14+105i$ is $14-105i$.
1. True
2. False
2.
What is the conjugate of $-4-3i$?
1. $4+3i$
2. $-4+3i$
3. $-4-3i$
3.
What is the complex conjugate of $-7+15i?$
1. $-7-15i$
2. $-7+15i$
3. $7-15i$
4. $7+15i$
4.
What is the complex conjugate of $20-6i$?
1. $20-6i$
2. $-20+6i$
3. $20+6i$
4. $-20-6i$
5.
What is the complex conjugate of $-250+81i$ ?
1. $-250-81i$
2. $250-81i$
3. $-250+81i$
4. $250+81i$
6.
Multiply $4+6i$ by its conjugate.
1. $16+12i+36i^2$
2. $52i$
3. $52$
4. $16+36i$
7.
Multiply $5-12i$ by its conjugate.
1. $169i$
2. $169$
3. $25+34i+144i^2$
4. $203i^3$
8.
Multiply $1-1i$ by its conjugate.
1. $1i$
2. $1$
3. $2$
4. $2i$
9.
Multiply $2-10i$ by its conjugate.
1. $24$
2. $102i$
3. $104$
4. $4-24i+100i^2$
10.
Multiply $-i$ by its conjugate.
1. $-1$
2. $1$
3. $1-i$
4. No conjugate exists
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