Multiplying Conjugates

Multiply: (4 - i)(4 + i)

• 17

• 17-8i

Multiply (5 + 2i)(5 - 2i)

• 21

• 29

• 29-10i

What type of number is the result of multiplying a complex number and its conjugate?

• Natural Number

• Imaginary Number

• Irrational Number

• Real Number

What is the conjugate you would multiply by?

• 2+i

• 2-i

• -2+i

• -2-i

Refer to the above image, what is the conjugate of the denominator?

• 8 + 6i

• 6 + 8i

• 6 - 8i

• -6 +8i

What is the numerator after multiplying and before simplifying?

• 5-4i

• 4i+5

• -5i

• 4-i

What is the conjugate you would multiply by?

• 5+2i

• 5-2i

• -5-2i

• -5+2i

What is the denominator after multiplying and before simplifying?

• 17

• 13

• 5i

• 15i

What is the denominator after multiplying and before simplifying?

• -10

• -2i

• 2i

• 10

What is the numerator after multiplying and before simplifying?

• 2-6i

• 2+6i

• -2+6i

• -2-6i