Section 3.2 Review (Alg 2)

Simplifiy:  $\left(5\ +\ 6i\right)+\left(2-3i\right)$  

• 7 + 6 i

• 7 - 3I

• 7 + 3i

• 3i + 7

Find the zeros:  $x^{2\ }+\ 9\ =\ 0$  

• No Solution

•  $x\ =\ \pm9$  

•  $x\ =\ \pm i\sqrt{9}$  

•  $x\ =\ \pm3i$  

Simplify $\left(2-\ i\right)\ \left(2+i\right)$  

•  $4\ -\ 2i$  

•  $4\ -\ i^2$  

• 5

• 5i

Find the values of x and y

 $15\ +5i\ =\ 30x\ -5yi$  

•  $x\ =\frac{1}{2\ }\ and\ y\ =\ -1$  

•  $x\ =\ 2\ and\ y\ =\ 1$  

•  $x\ =\ -\frac{1}{2}\ and\ y\ =1$  

•  $x\ =\ -1\ and\ y\ =\ \frac{1}{2}$  

Solve  $9x_{\ }^{2\ }\ -\ 81=0$  

• x =  $\pm9$  

• x =  $\pm3$  

• x = 3i

• x = 9i

 Solve $\left(\ 2-7i\right)-\left(3-4i\right)$ 

•  $6-33i+28i^2$  

•  $6\ +33i$  

•  $-1\ -\ 3i$  

•  $1\ +\ 3i$  

 $Simplify\ \left(5-i\right)\left(3-7i_{ }\right)$  

•  $15\ -\ 38\ i\ +7i^2$  

•  $8\ +\ 38i$  

•  $15\ -\ 38i$  

•  $8\ -\ 38i$  

 $Find\ the\ values\ for\ x\ and\ y:\ 4x\ +\ 12i=\ 16\ -6yi$  

•  $x\ =\ 4\ and\ y\ =\ 2$  

•  $x\ =\ -4\ and\ y\ =\ 2$  

•  $x\ =\ 4\ and\ y\ =\ -2\$  

•  $x\ =\ -2\ and\ y\ =4$  

Simplify.

• -5i
• 5
• 5i
• -5

Multiply: 
(4 – 3i)(-7 – 2i)

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