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# Common Core Standard HSN-CN.A.3 Questions

(+) Find the conjugate of a complex number; use conjugates to find moduli and quotients of complex numbers.

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Grade 11 Complex Numbers CCSS: HSN-CN.A.3
Multiply $5-12i$ by its conjugate.
1. $169i$
2. $169$
3. $25+34i+144i^2$
4. $203i^3$
Grade 11 Complex Numbers CCSS: HSN-CN.A.3
Multiply $1-1i$ by its conjugate.
1. $1i$
2. $1$
3. $2$
4. $2i$
Grade 11 Complex Numbers CCSS: HSN-CN.A.3
Multiply $2-10i$ by its conjugate.
1. $24$
2. $102i$
3. $104$
4. $4-24i+100i^2$
Grade 11 Complex Numbers CCSS: HSN-CN.A.3
Multiply $6+5i$ by its conjugate.
1. $61$
2. $61i$
3. $36+22i+25i^2$
4. $82i^3$
Grade 11 Complex Numbers CCSS: HSN-CN.A.3
Multiply $4+6i$ by its conjugate.
1. $16+12i+36i^2$
2. $52i$
3. $52$
4. $16+36i$
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