Adding, Subtracting, Multiplying Complex Numbers

Simplify. Write your answer in the form  $a+bi$  .

 $\left(2+4i\right)-\left(1-2i\right)$  

•  $3+2i$  

•  $1-2i$  

•  $1+6i$  

•  $10$  

Tags

CCSS.HSN.CN.A.2

Simplify. Write your answer in the form $a+bi$  .

 $\left(5-3i\right)\left(-2+4i\right)$  

•  $2+26i$  

•  $3+i$  

•  $-10-12i^2$  

•  $-22+14i$  

Tags

CCSS.HSN.CN.A.2

Simplify. Write your answer in the form $a+bi$  .

 $\left(-3+2i\right)\left(1+5i\right)$  

•  $-2+7i$  

•  $-13-13i$  

•  $-3+10i^2$  

•  $7+13i$  

Tags

CCSS.HSN.CN.C.8

Simplify the expression:
 $\left(1\ +\ 5i\right)\ +\ \left(1\ -\ 5i\right)$  

•  $2\ +\ 10i$  

•  $2\ +\ 10i^2$  

•  $2$  

•  $-8$  

Tags

CCSS.HSN.CN.A.2

Simplify the expression:
 $\left(8\ +\ 9i\right)\ +\ \left(4\ -\ 6i\right)$  

•  $17\ +\ 3i$  

•  $12\ +\ 3i^2$  

•  $17\ -2i$  

•  $12\ +\ 3i$  

Tags

CCSS.HSN.CN.A.2

Simplify the expression:
 $\left(5\ +\ 14i\right)\ -\ \left(10\ +\ 2i\right)$  

•  $5\ -16i$  

•  $-5\ +\ 16i$  

•  $5\ -\ 12i$  

•  $-5\ +\ 12i$  

Tags

CCSS.HSN.CN.A.2

√(-300)

• 10i√3
• 15√15
• -10√3
• 2i√13

Another way to express √-1 is?

• 1

• -1

• i

• 0

Tags

CCSS.HSN.CN.A.1