Imaginary/Complex Numbers

Calculate:
(4 − 7i) − (-3 + 6i)

• 7 − 13i
• 7 − i 
• 1 − 13i
• 1 − i 

Tags

CCSS.HSN.CN.A.2

Calculate: 
(1 − 2i) + (-4 + 2i)

• -3
• -3 − 4i
• 5 − 4i
• 5

Tags

CCSS.HSN.CN.A.2

What does i² =  ?

• 1
• -1
• √-1
• √1

Tags

CCSS.HSN.CN.A.1

6i (-5 + 10i)

• -30i + 60i²
• 30i − 16i²
• 11i + 60i²
• -11i²+ 16i

Tags

CCSS.HSA.APR.A.1

Calculate (multiply):
 (4 + 3i)(4 − 3i)

• 16 − 9i²
• 25
• 7
• 8 − 6i

Tags

CCSS.HSN.CN.C.8

Find the conjugate of:
5 + 7i

• 5 − 7i
• -5 − 7i
• -5 + 7i

Tags

CCSS.8.EE.A.2

Find the conjugate of:
-4 − 8i

• -4 + 8i
• 4 − 8i
• 4 + 8i

Tags

CCSS.HSN.CN.A.3

Simplify √-4

• 2i
• -2i
• 2
• 4i

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

Simplify -√-8

• -i√8
• -2i√2
• 2i√2
• -8i

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

CCSS.HSN.RN.A.2

Simplify: 
(10+ 15i)-(48 - 30i)

• 58 - 45i
• 58 - 15i
• -38 - 15i
• -38 + 45i

Tags

CCSS.HSA.APR.A.1