Complex Number Operations

Operations with Complex Numbers

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Multiple Choice

What is the simplified form of (-9 + 5i) + (3 -2i)

• -12 + 31i

• -6 + 3i

• -11 + 7i

• 5 - 3i

Multiple Choice

(5 - 2i) + (-7 + 8i)

• -2+6i

• 12+6i

• -35-16i²

• -35 -16i

Multiple Choice

What is the simplifies form of (11 - 7i) - (-3 + 12i)

• 8 - 19i

• 8 + 5i

• 13- 19i

• 14 -19i

Multiple Choice

(10 + 3i) - (2 - 9i)

• 20 - 27i

• 12 - 7i

• 8 + 12i

• 20 - 27i²

Multiple Choice

• i

• -i

• -1

• 1

Multiple Choice

Multiply
3i(-2 + 4i)

• -6+12i
• -12-6i
• -2+7i
• 12+6i

Multiple Choice

What is the simplified form of (-6i)(3i)

• -18

• -18i

• 18

• -18i²

Multiple Choice

What is the simplified form of (-3 + 2i)(1- 4i)

• -2 - 2i

• 5 + 14i

• -11 -10i

• -3 -8i

Multiple Choice

The product of (3 -2i) and (7+6i) is

• 21 - 12i

• 9 + 4i

• 33 + 4i

• 21 + 16i

Fill in the Blank

What is the conjugate of 9-i?

Fill in the Blank

What is the conjugate of 6i?

Fill in the Blank

What is the conjugate of 5i?

Fill in the Blank

simplify -15i-50(-1)

Fill in the Blank

What is the conjugate that we should multiply by for the expression (3+8i)/-i ?

Fill in the Blank

$$\frac{-4+8i}{-10i}$$  

Multiple Choice

• A
• B
• C
• D

Poll

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