Complex Numbers

• 10

• -10

• 10i

• -10i

• 5i

• -5i

• 5+i

• -5

Simplify:
√-108

• 3i√6
• 3i√20
• 6i√3
• 20i√3

Multiply: 
(4 – 3i)(-7 – 2i)

• A.  -23 + 13i
• B.  -23 - 29i
• C.  -34 + 13i
• D.  -34 - 29i

(3i)(-2+4i)

• -6+12i
• -12-6i
• -2+7i
• 12+6i

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

• -2+6i
• 12+6i
• -35-16i²
• -35 -16i

Look at the equation below.

 $x^2+2x-5=2$  

Which values of x satisfy the equation? Write your answers in simplest radical form.

•  $-1\pm2\sqrt{2}$  

•  $1\pm2\sqrt{2}$  

•  $-1\pm2i\sqrt{2}$  

•  $1\pm2i\sqrt{2}$  

Look at the equation below.

 $x^2+5x+7=0$  

What are the solutions of the equation? Write your answers in simplest radical form.

•  $\frac{-5\pm\sqrt{3}}{2}$  

•  $\frac{-5\pm i\sqrt{3}}{2}$  

•  $\frac{-5\pm\sqrt{53}}{2}$  

•  $\frac{-5\pm i\sqrt{53}}{2}$  

(1-3i)(2+5i)

• 22-i
• 16-i
• 17-i

Solve the following equation. Write your answers in simplest radical form.

 $x^2+10x+35=0$  

•  $-5\pm2i\sqrt{5}$  

•  $-5\pm i\sqrt{5}$  

•  $-5\pm2i\sqrt{10}$  

•  $-5\pm i\sqrt{10}$