Precalculus Complex Conjugates Rational Functions

What is the conjugate of i + 4?

• i + 4

• i - 4

• -i-4

• -i+4

Simplify

• 9i/5

• 2i

• 8i/5

• 13i/5

Simplify

• -4-6i

• (-15i+8)/4

• (-4+8i)/15

• (-4i+8)/15

What is the conjugate of 3 - 2i?

• 2-3i

• 3-2i

• 3+2i

• 2+3i

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

• 8 + 6i

• 6 + 8i

• 6 - 8i

• -6 +8i

What is the conjugate of 5 + 7i?

• 5-7i

• 5+7i

• 7i-5

• 7-5i

What type of number results from the SUM of two cojugates?

• Real Number

• Natural Number

• Imaginary Number

• Irrational Number

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