Adding, Subtracting, Multiplying Complex Numbers

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

•  $2\ +\ 10i$  

•  $2\ +\ 10i^2$  

•  $2$  

•  $-8$  

Tags

CCSS.HSN.CN.A.1

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.1

CCSS.HSN.CN.A.2

(5-i)(5-i)

• 15-8i
• 36
• 24+10i
• 24-10i

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

Simplify: $\left(1\ +\ 3i\right)\ +\ \left(7\ -\ 2i\right)$  

• 8+i

• i+8

• 8+5i

• 5i+8

Tags

CCSS.HSN.CN.A.1

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.1

CCSS.HSN.CN.A.2

(-3-i)(6-i)

• -21-7i
• -19-3i
• -15-5i
• -17-9i

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

Simplify the expression:
 $\left(5\ +\ 4i\right)\ -\ \left(-1\ -\ 2i\right)$  

•  $6\ +6i$  

•  $4\ +\ 2i$  

•  $6\ -\ 6i$  

•  $4\ -\ 2i$  

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

What is the standard form for a complex number?

• -8i
• a + bi
• bi + a
• -8i + 8

Tags

CCSS.HSN.CN.A.1

(2i)(3i)

• 5i
• -5
• 6i
• -6

Tags

CCSS.HSN.CN.C.8

Another way to express √-1 is?

• 1

• -1

• i

• 0

Tags

CCSS.HSN.CN.A.1