Simplifying Complex Numbers

What does i² = ?

• -1
• √-1
• 1
• -√1

Tags

CCSS.HSN.CN.A.1

How do you write a complex number?

• a-bi

• a+bi

• ai+b

• ai-b

Tags

CCSS.HSN.CN.A.1

Which of the following is a pure Imaginary number?

• 4+8i

• 2-i

• 16i

• -8+12i

Tags

CCSS.HSN.CN.A.1

Find the sum.
(5-2i) + (-7+8i)

• -2+6i
• 12+6i
• -35-16i²
• -35 -16i

Tags

CCSS.HSN.CN.A.2

Multiply
(2i)(3i)

• 5i
• -5
• 6i
• -6

Tags

CCSS.HSN.CN.A.2

Multiply: 
(4 – 3i)(7 + 2i)

• A.  22 - 13i
• B.  28 - 19i
• C.  34 - 13i
• D.  -34 - 29i

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

(11 - 2i) - (15 + 6i)

• -4 - 8i
• 21 -12i
• 1- 19i
• -8 + 2i

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

Simplify the following expression:

(5+6i)(5-6i)

• 11

• 61

• -11

• 22

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

Simplify
3i - (4 + 7i)

• -4 + 10i
• 21 - 12i
• 4 - 10i
• -4 - 4i

Tags

CCSS.HSN.CN.A.2

3i(4 - i)

• 9i

• -3 +12i

• 12 - 3i

• 3 + 12i

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2