(4-1) Complex Division

What is a complex conjugate?

• Opposite real parts, same imaginary parts

• Same real parts, Opposite imaginary parts

• Opposite both real and imaginary parts

Tags

CCSS.HSN.CN.A.3

What is the benefit of multiplying a complex number by its' conjugate?

• It's just like real number division

• It's just like the area model

• It removes the imaginary part of the number

• It removes the real part of the number

Tags

CCSS.HSN.CN.A.1

What is the complex conjugate of  $\left(2+2i\right)$  ?

•  $\left(2+2i\right)$  

•  $\left(-2+2i\right)$  

•  $\left(2-2i\right)$  

•  $\left(-2-2i\right)$  

Tags

CCSS.HSN.CN.A.3

What is the complex conjugate of $\left(-4-7i\right)$  ?

•  $\left(-4-7i\right)$  

•  $\left(4-7i\right)$  

•  $\left(-4+7i\right)$  

•  $\left(4+7i\right)$  

Tags

CCSS.HSN.CN.A.3

What is the conjugate of $\left(-17i\right)$  ?

•  $\left(-17i\right)$  

•  $\left(17i\right)$  

•  $\left(17\right)$  

•  $\left(-17\right)$  

Tags

CCSS.HSN.CN.A.3

 $\left(2-i\right)\left(2+i\right)$  

Multiply

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CCSS.HSN.CN.A.2

Multiply $\left(1+4i\right)\left(1-4i\right)$  

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CCSS.HSN.CN.C.8

What do we multiply this expression by $\frac{\left(3+4i\right)}{\left(2-i\right)}$  ?

•  $3+4i$  

•  $2+i$  

•  $2-i$  

•  $3-4i$  

Tags

CCSS.HSN.CN.A.3

What do we multiply this expression by: $\frac{\left(2-3i\right)}{\left(1+4i\right)}$  

•  $1+4i$  

•  $2-3i$  

•  $2+3i$  

•  $1-4i$  

Tags

CCSS.HSN.CN.A.3

What do we multiply this expression by: $\frac{\left(1+7i\right)}{\left(3-8i\right)}$  

•  $1+7i$  

•  $1-7i$  

•  $3-8i$  

•  $3+8i$  

Tags

CCSS.HSN.CN.A.3