Complex Solutions and Simplifying Imaginary

What is the conjugate of the following... 4+i

• 4 + i

• -4 + i

• -4 - i

• 4 - i

Rationalize the denominator and simplify completely.

Multiply: 
(4 – 3i)(-7 – 2i)

•   -23 + 13i

•   -23 - 29i

•   -34 + 13i

•   -34 - 29i

Calculate (multiply):
(1 − 2i)(6 + 5i)

• 16 − 7i

• -16 + 7i

• -16 − 7i

• 16 + 7i

Simplify: √-25

• 5

• -5

• 5i

• -5i

Simplify: √-100

• 10i

• -10i

• 10

• -10

Calculate:
i + 6i

• 6i²

• 7i

• 5i

• 7i²

Calculate:
2i × 4i

• 8i

• 6i

• 8i²

• 6i²

Calculate: 
-12i + 7i

• 19i

• -19i

• 5i

• -5i

Calculate:
-4 (13 + 5i) 

• -52 − 20i

• 9 + i

• 17 − 20i

• -52 + 20i