Complex Number Review

Add: (3 - 6i) + (-2 - 2i)

• 5+8i
• 1+8i
• 1-8i
• -18-6i

Subtract: (9 - 2i) - (-2 + 5i)

• 7 - 7i
• 11 - 7i
• 11 + 3i
• 7 + 3i

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

Multiply: (2 + 4i)( -3 - 5i)

• 14 - 22i
• -26 - 22i
• 14 + 2i
• 26 + 22i

Simplify: 3/4i

• 12/i
• 3i/4
• 3i/-4
• 4i/-3

Simplify: (5 - 2i) / 7i

• 3i / -7
• -3/7
• (5i - 2) / -7
• (5i + 2) / -7

Simplify: 2i / (5-3i)

• 4i / (25 + 9i)
• (6 + 10i) / 16
• 16i / 34
• (-6 + 10i) / 34

Simplify: (1 - 6i) / (-2 + 3i)

• (-20 + 9i) / 13
• (-20 - 15i) / 13
• (16 + 9i) / 13
• 29i / 13

Given the complex number: (31 - 6i) / 5 , write as "a + bi " and identify a and b .

• a = 31/5 ; b = 6/5
• a = 31/5 ; b = -6/5
• a = 31 ; b = -6
• a = -31 ; b = 6

Solve and write your answer in terms of i : 3x² + 48 = 0

• x = 16i ; x = -16i
• x = 4i ; x = -4i
• x = 16i
• x = 4i

Tags

CCSS.HSA.REI.B.4

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

CCSS.HSN.CN.C.7

When plotting (-6 + 2i) in the complex plane, which quadrant will it be in?

• 1
• 2
• 3
• 4