Complex Conjugate Precalculus

What is the conjugate of -2i + 7

• -2i - 7

• 2i - 7

• -7 + 2i

• 7 + 2i

What is the conjugate of i + 4?

• i + 4

• i - 4

• -i-4

• -i+4

Simplify

• 17i

• 15i

• 4i-10

• 2i-10

(7 - 3i)(7 + 6i)

• 31 - 63i

• -18i² + 21i + 49

• 67 + 21i

• 67 - 21i

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

• 8 + 6i

• 6 + 8i

• 6 - 8i

• -6 +8i

What is the complex conjugate of  4 - 3i?

•   1/(4-3i)

• 1/(4+3i)

•   -4 + 3i

•   4 + 3i

What is the conjugate of 3 - 2i?

• 2-3i

• 3-2i

• 3+2i

• 2+3i

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